From Wikipedia, the free encyclopedia
← 262 263 264 →
Cardinaltwo hundred sixty-three
Ordinal263rd
(two hundred sixty-third)
Factorization prime
Primeyes
Greek numeralΣΞΓ´
Roman numeralCCLXIII
Binary1000001112
Ternary1002023
Senary11156
Octal4078
Duodecimal19B12
Hexadecimal10716

263 (two hundred [and] sixty-three) is the natural number between 262 and 264. It is also a prime number.

In mathematics

263 is a balanced prime, [1] an irregular prime, [2] a Ramanujan prime, [3] a Chen prime, [4] and a safe prime. [5]

It is also a strictly non-palindromic number and a happy number. [6]

References

  1. ^ Sloane, N. J. A. (ed.). "Sequence A006562 (Balanced primes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  2. ^ Sloane, N. J. A. (ed.). "Sequence A000928 (Irregular primes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  3. ^ Sloane, N. J. A. (ed.). "Sequence A104272 (Ramanujan primes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  4. ^ "Sloane's A109611 : Chen primes". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-04-21.
  5. ^ Sloane, N. J. A. (ed.). "Sequence A005385 (Safe primes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  6. ^ "Sloane's A007770 : Happy numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-04-21.
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