About the Number 263 (two hundred sixty-three)

The Safe Primes nBAB collection was created on 15 September 2015. 263 was the smallest Safe Prime that didn't have a nBAB for it when the Safe Primes collection was created.

MathBabbler Number Analyst (MBNA) output:
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263 is a natural, whole, integer
263 is odd
263 proper divisors are: 1,
263 has 1 proper divisors
263 is deficient (sum of divisors is 1; ratio: 0.00380228)
263 is happy
263 is a Squarefree Number
263 is prime (not composite)
...Safe prime with 131
...Sexy prime with 269
...Sexy prime with 257
...Sexy Triplet prime with 257, 251
...Truman Gerald prime with 293
...Truman Gerald prime with 233
...OEIS:002145 (4n+3; n=65)
...Eisenstein
263 is Arithmetic (A003601)
263 is ThurmNumber
263 is the sum of 5 consecutive primes
263 = 43 + 47 + 53 + 59 + 61
263 in octal is 0407
263 in hexadecimal is 0x107
263 in binary is 100000111 (is evil)
263 nearest square numbers: -7...26 (256...289 [17])
sqrt(263) = 16.2173
ln(263) = 5.57215
log(263) = 2.41996
263 reciprocal is .00380228136882129277566539923954
263! is 6.8884e+523
263 is 83.7155 Pi years
263 is 13 score and 3 years
263 written as a Roman numeral is CCLXIII
263 is 132^2 - 131^2 and 132 + 131 = 263

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 16 September 2015

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