269 (number)

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Short description: Natural number
← 268 269 270 →
Cardinaltwo hundred sixty-nine
Ordinal269th
(two hundred sixty-ninth)
Factorizationprime
Primeyes
Greek numeralΣΞΘ´
Roman numeralCCLXIX
Binary1000011012
Ternary1002223
Quaternary100314
Quinary20345
Senary11256
Octal4158
Duodecimal1A512
Hexadecimal10D16
VigesimalD920
Base 367H36

269 (two hundred [and] sixty-nine) is the natural number between 268 and 270. It is also a prime number.

In mathematics

269 is a twin prime,[1] and a Ramanujan prime.[2] It is the largest prime factor of 9! + 1 = 362881,[3] and the smallest natural number that cannot be represented as the determinant of a 10 × 10 (0,1)-matrix.[4]

References

  1. ↑ Sloane, N. J. A., ed. "Sequence A001359 (Lesser of twin primes)". OEIS Foundation. https://oeis.org/A001359. 
  2. ↑ Sloane, N. J. A., ed. "Sequence A104272 (Ramanujan primes)". OEIS Foundation. https://oeis.org/A104272. 
  3. ↑ Sloane, N. J. A., ed. "Sequence A002583 (Largest prime factor of n! + 1)". OEIS Foundation. https://oeis.org/A002583. 
  4. ↑ Sloane, N. J. A., ed. "Sequence A013588 (Smallest positive integer not the determinant of an n X n 0-1 matrix)". OEIS Foundation. https://oeis.org/A013588. 



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