279 ( seventy nine hundred ) - a natural number between 278 and 280 .
- The 279th day of the year - October 6 (in a leap year - October 5 ).
| 279 | |
|---|---|
| two hundred seventy nine | |
| ← 277 · 278 · 279 · 280 · 281 → | |
| Factorization | 3 2 · 31 |
| Roman record | CCLXXIX |
| Binary | 100010111 |
| Octal | 427 |
| Hexadecimal | 117 |
Content
In Math
- 279 - is an odd composite [1] three-digit number.
- The sum of the digits of the number 279 - 18
- The product of the digits of this number is 126
- The square of the number 279 - 77 841
- 279 = 3 2 + 3 3 + 3 5 .
- 279 = (27 × 9) + (27 + 9)
- The sum of 13 consecutive primes : 279 = 3 + 5 + 7 + 11 + 13 + 17 + 19 + 23 + 29 + 31 + 37 + 41 + 43.
- 279 +2 and +4 are twin prime numbers .
- In addition, 10 × 279 ± 1 are prime twin numbers.
In Astronomy
- NGC 279 is a lenticular galaxy in the constellation Kit .
- (279) Tula is a large asteroid on the outer part of the main belt .
In other areas
- 279 year .
- 279 BC er
Notes
- ↑ sequence A002808 / b002808.txt in OEIS