900 (number)

For the year 900, see900 BCand900 AD.

"976 (number)" redirects here. Not to be confused with976 number.

← 899 900 901 →
List of numbers Integers ←0100200300400500600700800900→
Cardinal	nine hundred
Ordinal	900th (nine hundredth)
Factorization	22× 32× 52
Divisors	1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 25, 30, 36, 45, 50, 60, 75, 90, 100, 150, 180, 225, 300, 450, 900
Greek numeral	Ϡ´
Roman numeral	CM
Binary	11100001002
Ternary	10201003
Senary	41006
Octal	16048
Duodecimal	63012
Hexadecimal	38416
Armenian	Ջ
Hebrew	תת "ק / ץ
Babylonian cuneiform	𒌋𒐙
Egyptian hieroglyph	𓍪

900(nine hundred) is thenatural numberfollowing899and preceding901.It is thesquareof30and the sum ofEuler's totient functionfor the first 54positive integers.In base 10 it is aHarshad number.It is also the first number to be the square of asphenic number.

In other fields

900is also:

• A telephonearea codefor"premium" telephone callsin theNorth American Numbering Plan(900 number)
• In Greeknumber symbols,the signSampi( "ϡ", literally "like api")
• Askateboarding trickin which the skateboarder spins two and a half times (360 degrees times 2.5 is 900)
• A900 seriesrefers to three consecutiveperfect gamesinbowling
• Yoda'sage inStar Wars

Integers from 901 to 999

900s

• 901 = 17 × 53,centered triangular number,happy number
• 902 = 2 × 11 × 41,sphenic number,nontotient,Harshad number
• 903 = 3 × 7 × 43, sphenic number, triangular number,Schröder–Hipparchus number,Mertens function(903) returns 0,little Schroeder number
• 904 = 2³× 113 or 113 × 8,refactorable number,Mertens function(904) returns 0,lazy caterer number,number of 1's in all partitions of 26 into odd parts
• 905 = 5 × 181, sum of seven consecutive primes (109 + 113 + 127 + 131 + 137 + 139 + 149), smallest composite de Polignac number
  • "The 905" isa common nicknamefor the suburban portions of theGreater Toronto Areain Canada, a region whose telephones usedarea code 905beforeoverlay plansadded two more area codes.
• 906 = 2 × 3 × 151,strobogrammatic,sphenic number, Mertens function(906) returns 0
• 907 = prime number
• 908 = 2²× 227, nontotient, number of primitive sorting networks on 6 elements,number of rhombic tilings of a 12-gon
• 909 = 3²× 101, number of non-isomorphic aperiodic multiset partitions of weight 7

910s

• 910 = 2 × 5 × 7 × 13, Mertens function(910) returns 0, Harshad number,happy number,balanced number,number of polynomial symmetric functions of matrix of order 7 under separate row and column permutations
• 911=Sophie Germainprime number, also theemergency telephone numberin North America
• 912 = 2⁴× 3 × 19, sum of four consecutive primes (223 + 227 + 229 + 233), sum of ten consecutive primes (71 + 73 + 79 + 83 + 89 + 97 + 101 + 103 + 107 + 109), Harshad number.
• 913 = 11 × 83,Smith number,Mertens function(913) returns 0.
• 914 = 2 × 457, nontotient, number of compositions of 11 that are neither weakly increasing nor weakly decreasing
• 915 = 3 × 5 × 61, sphenic number, Smith number,Mertens function(915) returns 0, Harshad number
• 916 = 2²× 229, Mertens function(916) returns 0, nontotient,strobogrammatic,member of theMian–Chowla sequence
• 917 = 7 × 131, sum of five consecutive primes (173 + 179 + 181 + 191 + 193)
• 918 = 2 × 3³× 17, Harshad number
• 919 = prime number,cuban prime,prime index prime,Chen prime,palindromic prime,centered hexagonal number,Mertens function(919) returns 0

920s

• 920 = 2³× 5 × 23, Mertens function(920) returns 0, total number of nodes in all rooted trees with 8 nodes
• 921 = 3 × 307, number of enriched r-trees of size 7
• 922 = 2 × 461, nontotient, Smith number
• 923 = 13 × 71, number of combinations of 6 things from 1 to 6 at a time
• 924 = 2²× 3 × 7 × 11, sum of a twin prime (461 + 463),central binomial coefficient${\tbinom {12}{6}}$
• 925 = 5²× 37,pentagonal number,centered square number
  • Themillesimal finenessnumber forSterling silver
• 926 = 2 × 463, sum of six consecutive primes (139 + 149 + 151 + 157 + 163 + 167), nontotient
• 927 = 3²× 103,tribonacci number
• 928 = 2⁵× 29, sum of four consecutive primes (227 + 229 + 233 + 239), sum of eight consecutive primes (101 + 103 + 107 + 109 + 113 + 127 + 131 + 137),happy number
• 929 = prime number,Proth prime,palindromic prime, sum of nine consecutive primes (83 + 89 + 97 + 101 + 103 + 107 + 109 + 113 + 127),Eisenstein primewith no imaginary part
  • Anarea code in New York.

930s

• 930 = 2 × 3 × 5 × 31,pronic number
• 931 = 7²× 19; sum of three consecutive primes (307 + 311 + 313); doublerepdigit,111₃₀and 777₁₁;number of regular simple graphs spanning 7 vertices
• 932 = 2²× 233, number of regular simple graphs on 7 labeled nodes
• 933 = 3 × 311
• 934 = 2 × 467, nontotient
• 935 = 5 × 11 × 17, sphenic number,Lucas–Carmichael number,Harshad number
• 936 = 2³× 3²× 13,pentagonal pyramidal number,Harshad number
• 937 = prime number, Chen prime,star number,happy number
• 938 = 2 × 7 × 67, sphenic number, nontotient, number of lines through at least 2 points of an 8 × 8 grid of points
• 939 = 3 × 313, number of V-toothpicks after 31 rounds of the honeycomb sequence

940s

• 940 = 2²× 5 × 47, totient sum for first 55 integers
• 941 = prime number, sum of three consecutive primes (311 + 313 + 317), sum of five consecutive primes (179 + 181 + 191 + 193 + 197), Chen prime, Eisenstein prime with no imaginary part
• 942 = 2 × 3 × 157, sphenic number, sum of four consecutive primes (229 + 233 + 239 + 241), nontotient, convolved Fibonacci number
• 943 = 23 × 41
• 944 = 2⁴× 59, nontotient, Lehmer-Comtet number
• 945 = 3³× 5 × 7,double factorialof9,smallest oddabundant number(divisors less than itself add up to 975);smallest oddprimitive abundant number;smallest oddprimitive semiperfect number;Leyland number
• 946 = 2 × 11 × 43, sphenic number, triangular number,hexagonal number,happy number
• 947 = prime number, sum of seven consecutive primes (113 + 127 + 131 + 137 + 139 + 149 + 151),balanced prime,Chen prime,lazy caterer number,Eisenstein primewith no imaginary part
• 948 = 2²× 3 × 79, nontotient, forms aRuth–Aaron pairwith 949 under second definition, number of combinatory separations of normal multisets of weight 6.
• 949 = 13 × 73, forms a Ruth–Aaron pair with 948 under second definition

950s

• 950 = 2 × 5²× 19, nontotient,generalized pentagonal number
  • one of twoISBNGroup Identifiers for books published inArgentina
• 951 = 3 × 317,centered pentagonal number
  • one of two ISBN Group Identifiers for books published in Finland
• 952 = 2³× 7 × 17, number of reduced words of length 3 in the Weyl group D_17,number of regions in regular tetradecagon with all diagonals drawn.
  • 952 is also9-5-2,acard gamesimilar tobridge.
  • one of two ISBN Group Identifiers for books published in Finland
• 953 = prime number, Sophie Germain prime,Chen prime, Eisenstein prime with no imaginary part,centered heptagonal number
  • ISBN Group Identifier for books published inCroatia
• 954 = 2 × 3²× 53, sum of ten consecutive primes (73 + 79 + 83 + 89 + 97 + 101 + 103 + 107 + 109 + 113), nontotient, Harshad number, sixth derivative of x^(x^x) at x=1.
  • ISBN Group Identifier for books published in Bulgaria. Also one of theArea Codesin theSouth FloridaArea
• 955 = 5 × 191, number of transitive rooted trees with 17 nodes
  • ISBN Group Identifier for books published in Sri Lanka
• 956 = 2²× 239, number of compositions of 13 into powers of 2.
  • ISBN Group Identifier for books published in Chile
• 957 = 3 × 11 × 29, sphenic number, antisigma(45)
  • one of two ISBN Group Identifiers for books published in Taiwan and China
• 958 = 2 × 479, nontotient,Smith number
  • ISBN Group Identifier for books published inColombia
  • Themillesimal finenessnumber forBritannia silver
• 959 = 7 × 137, composite de Polignac number
  • ISBN Group Identifier for books published in Cuba

960s

• 960 = 2⁶× 3 × 5, sum of six consecutive primes (149 + 151 + 157 + 163 + 167 + 173), Harshad number
  • country calling code for Maldives, ISBN Group Identifier for books published in Greece
  • The number of possible starting positions for the chess variantChess960
• 961 = 31²,the largest 3-digit perfect square, sum of three consecutive primes (313 + 317 + 331), sum of five consecutive primes (181 + 191 + 193 + 197 + 199),centered octagonal number
  • country calling code for Lebanon, ISBN Group Identifier for books published inSlovenia
• 962 = 2 × 13 × 37, sphenic number, nontotient
  • country calling code for Jordan, one of two ISBN Group Identifiers for books published in Hong Kong
• 963 = 3²× 107, sum of the first twenty-four primes
  • country calling code for Syria, ISBN Group Identifier for books published in Hungary
• 964 = 2²× 241, sum of four consecutive primes (233 + 239 + 241 + 251), nontotient, totient sum for first 56 integers
  • country calling code for Iraq, ISBN Group Identifier for books published in Iran,happy number
• 965 = 5 × 193
  • country calling code for Kuwait, ISBN Group Identifier for books published in Israel
• 966 = 2 × 3 × 7 × 23 =$\left\{{8 \atop 3}\right\}$,sum of eight consecutive primes (103 + 107 + 109 + 113 + 127 + 131 + 137 + 139), Harshad number
  • country calling code for Saudi Arabia, one of two ISBN Group Identifiers for books published in Ukraine
• 967 = prime number,prime index prime
  • country calling code for Yemen, one of two ISBN Group Identifiers for books published in Malaysia
• 968 = 2³× 11²,nontotient,Achilles number,area of a square with diagonal 44
  • country calling code for Oman, one of two ISBN Group Identifiers for books published in Mexico
• 969 = 3 × 17 × 19, sphenic number,nonagonal number,tetrahedral number
  • ISBN Group Identifier for books published in Pakistan, age ofMethuselahaccording to Old Testament,anti-Muslim movement in Myanmar

970s

• 970 = 2 × 5 × 97, sphenic number,heptagonal number
  • country calling code for Palestinian territories, one of two ISBN Group Identifiers for books published in Mexico
• 971= prime number, Chen prime, Eisenstein prime with no imaginary part
  • country calling code for United Arab Emirates, ISBN Group Identifier for books published in the Philippines
• 972 = 2²× 3⁵,Harshad number,Achilles number
  • country calling code for Israel, one of two ISBN Group Identifiers for books published in Portugal
    • The Sum of Anti-Factors of 972 = number * (n/2) where n is an Odd number. So, it is a Hemi-Anti-Perfect Number. Other such Numbers include 2692, etc.

972 has Anti-Factors = 5, 8, 24, 29, 67, 72, 216, 389, 648

Sum of Anti-Factors = 5 + 8 + 24 + 29 + 67 + 72 + 216 + 389 + 648 = 1458 = 972 * 3/2

• 973 = 7 × 139,happy number
  • country calling code for Bahrain, ISBN Group Identifier for books published in Romania,
• 974 = 2 × 487, nontotient, 974! - 1 is prime
  • country calling code for Qatar, ISBN Group Identifier for books published in Thailand
• 975 = 3 × 5²× 13
  • country calling code for Bhutan, ISBN Group Identifier for books published in Turkey
• 976 = 2⁴× 61,decagonal number
  • country calling code for Mongolia, ISBN Group Identifier for books published inAntigua,Bahamas,Barbados,Belize,Cayman Islands,Dominica,Grenada,Guyana,Jamaica,Montserrat,Saint Kitts and Nevis,St. Lucia,St. Vincent and the Grenadines,Trinidad and Tobago,and theBritish Virgin Islands
• 977 = prime number, sum of nine consecutive primes (89 + 97 + 101 + 103 + 107 + 109 + 113 + 127 + 131), balanced prime,Chen prime, Eisenstein prime with no imaginary part,Stern prime,strictly non-palindromic number
  • country calling code for Nepal
  • EANprefix forISSNs
  • ISBN Group Identifier for books published inEgypt
• 978 = 2 × 3 × 163, sphenic number, nontotient, number of secondary structures of RNA molecules with 11 nucleotides
  • FirstEANprefix for ISBNs
  • ISBN Group Identifier for books published inNigeria
• 979 = 11 × 89, the sum of the five smallest fourth powers:$979=\sum _{n=1}^{5}n^{4}$
  • SecondEANprefix for ISBNs. Also for ISMNs
  • ISBN Group Identifier for books published inIndonesia

980s

• 980 = 2²× 5 × 7²,number of ways to tile a hexagon of edge 3 withcalissonsof side 1.
  • ISBN Group Identifier for books published inVenezuela
• 981 = 3²× 109
  • one of two ISBN Group Identifiers for books published inSingapore
• 982 = 2 × 491,happy number
  • ISBN Group Identifier for books published in theCook Islands,Fiji,Kiribati,Marshall Islands,Micronesia,Nauru,New Caledonia,Niue,Palau,Solomon Islands,Tokelau,Tonga,Tuvalu,Vanuatu,Western Samoa
• 983 = prime number,safe prime,Chen prime, Eisenstein prime with no imaginary part,Wedderburn–Etherington number,strictly non-palindromic number
  • One of two ISBN Group Identifiers for books published inMalaysia
• 984 = 2³× 3 × 41
  • ISBN Group Identifier for books published inBangladesh
• 985 = 5 × 197, sum of three consecutive primes (317 + 331 + 337),Markov number,Pell number,Smith number
  • one of two ISBN Group Identifiers for books published inBelarus
• 986 = 2 × 17 × 29, sphenic number, nontotient,strobogrammatic,number of unimodal compositions of 14 where the maximal part appears once
  • one of two ISBN Group Identifiers for books published in Taiwan and China
• 987 = 3 × 7 × 47,sphenic number,Fibonacci number,number of partitions of 52 into prime parts
  • one of two ISBN Group Identifiers for books published in Argentina
• 988 = 2²× 13 × 19, nontotient. sum of four consecutive primes (239 + 241 + 251 + 257). Acake number.
  • one of two ISBN Group Identifiers for books published in Hong Kong.
• 989 = 23 × 43, Extra strongLucas pseudoprime
  • one of two ISBN Group Identifiers for books published in Portugal

990s

• 990 = 2 × 3²× 5 × 11, sum of six consecutive primes (151 + 157 + 163 + 167 + 173 + 179), triangular number,Harshad number
  • best possibleVantageScorecredit score
• 991 = prime number, sum of five consecutive primes (191 + 193 + 197 + 199 + 211), sum of seven consecutive primes (127 + 131 + 137 + 139 + 149 + 151 + 157), Chen prime, lucky prime,prime index prime
• 992 = 2⁵× 31,pronic number,nontotient; number of eleven-dimensionalexotic spheres.
  • country calling code for Tajikistan
• 993 = 3 × 331
  • country calling code for Turkmenistan
• 994 = 2 × 7 × 71, sphenic number, nontotient, number of binary words of length 13 with all distinct runs.
  • country calling code for Azerbaijan
• 995 = 5 × 199
  • country calling code for Georgia
  • Singapore fire brigade and emergency ambulance services hotline,Brunei Darussalamfire service emergency number
• 996 = 2²× 3 × 83
  • country calling code for Kyrgyzstan
• 997 = largest three-digit prime number, strictly non-palindromic number.It is also alucky prime.
• 998 = 2 × 499, nontotient, number of 7-node graphs with two connected components.
  • country calling code for Uzbekistan

Main article:999 (number)

• 999 = 3³× 37,Kaprekar number,Harshad number
  • In some parts of the world, such as the UK andCommonwealthcountries,999(pronounced asnine, nine, nine) is theemergency telephone numberfor all emergency services
  • 999was a Londonpunkband active during the 1970s.