247 (number)
| ||||
|---|---|---|---|---|
| Cardinal | two hundred forty-seven | |||
| Ordinal | 247th (two hundred forty-seventh) | |||
| Factorization | 13 × 19 | |||
| Greek numeral | ΣΜΖ´ | |||
| Roman numeral | CCXLVII | |||
| Binary | 111101112 | |||
| Ternary | 1000113 | |||
| Senary | 10516 | |||
| Octal | 3678 | |||
| Duodecimal | 18712 | |||
| Hexadecimal | F716 | |||
247(two hundred [and] forty-seven) is thenatural numberfollowing246and preceding248.
Additionally, 247 is:
- asemiprime.
- a brilliant number (the product of two primes with the same number of digits).[1]
- apentagonal number.[2]
- palindromic in base 18 (DD18).
- aHarshad numberin bases 10, 14, 19, 20, 27, 39, 40, 58, 77, 79, 115, 118, 229 and 235.
- the smallest number which can be expressed as the difference between two integers that contain together all the decimal digits 0–9. i.e. 247 = 50123 - 49876.[3]
References[edit]
- ^"Sloane's A078972: Brilliant numbers".The On-Line Encyclopedia of Integer Sequences.OEIS Foundation.Retrieved2016-05-28.
- ^"Sloane's A000326: Pentagonal numbers".The On-Line Encyclopedia of Integer Sequences.OEIS Foundation.Retrieved2016-05-28.
- ^Friedman, Erich."What's Special About This Number?".stetson.edu.Archived fromthe originalon 23 February 2018.Retrieved15 April2016.