97 (number)

← 96 97 98 →
←90919293949596979899→ List of numbers Integers ←0102030405060708090→
Cardinal	ninety-seven
Ordinal	97th (ninety-seventh)
Factorization	prime
Prime	25th
Divisors	1, 97
Greek numeral	ϞΖ´
Roman numeral	XCVII
Binary	11000012
Ternary	101213
Senary	2416
Octal	1418
Duodecimal	8112
Hexadecimal	6116

97(ninety-seven) is thenatural numberfollowing96and preceding98.It is aprime numberand the only prime in the nineties.

In mathematics

97is:

• the 25thprime number(the largest two-digit prime number inbase 10), following89and preceding101.
• aProth primeand aPierpont primeas it is 3 × 2⁵+ 1.
• the eleventh member of theMian–Chowla sequence.
• aself numberin base 10, since there is nointegerthat added to its own digits, adds up to 97.
• the smallest odd prime that is not acluster prime.
• the highest two-digit number where the sum of its digits is a square.
• the number of primes <= 2⁹.
• The numbers 97, 907, 9007, 90007 and 900007 are all primes, and they are allhappy primes.However, 9000007 (read asnine million seven) iscompositeand has the factorisation277× 32491.
• anemirpwith79.
• an isolated prime, since 95 and 99 aren't prime.

In science

Ninety-sevenis:

• Theatomic numberofberkelium,anactinide.

In astronomy

• Messier objectM97,amagnitude12.0planetary nebulain theconstellationUrsa Major,also known as theOwl Nebula
• TheNew General CatalogueobjectNGC 97,anelliptical galaxyin the constellationAndromeda

In other fields

Ninety-sevenis:

• The97th United States Congressmet during theRonald Reaganadministration, from January 1981 to January 1983
• The 10-97police codemeans "arrived on the scene"
• STS-97Space ShuttleEndeavourmission launched November 30, 2000
• The97th Infantry Divisionwas a unit of theUnited States ArmyinWorld War IandWorld War II
• Madden NFL 97was the firstJohn MaddenNFLAmerican footballgame to be created in the 32-bit gaming era
• Radio stations broadcasting on frequencies near 97, such asHot 97,New York Cityand97X,Tampa,Florida
• The decimalunicodenumber representing theLatinlowercase "a"

In music

• A song "Baby Boy / Saturday Night '97"byWhigfield
• The number of theSouthern Railwaytrain in theWreck of the Old 97,a ballad recorded by numerous artists, includingFlatt and Scruggs,Woody Guthrie,Johnny Cash,Nine Pound Hammer,andHank Snow.
• TheOld 97'sare analt-countryband, which took their name from the song "The Wreck of the Old '97".
• A song byAlkaline Triooff their self-titled album
• TheMarching 97,marching bandofLehigh University.
• District 97,aprogressive rockband from theChicago area(named after the elementary school District 97 inOak Park, Illinois).

See also

• List of highways numbered 97