263

263 is a Prime Number, Prime(56)

263 = 12 + 3 + 4 × 56 + 7 + 8 + 9

263 = 9 + 8 + 7 × 6 × 5 + 4 + 32 × 1

263 = 0^6 + 1^8 + 2^9 − 3^7 + 4^5 + 5^4 + 6^3 + 7^1 + 8^2 + 9^0

Sexy Prime (Primes p such that p + 6 is also prime)

Prime of the form 4 k^2 + 163

Numbers k such that 2^k + 9 is prime

a(n) is the sum of the prime factors (with repetition) of the sum of the preceding terms; a(1)=a(2)=1. (n=11)

263 is an irregular prime, since it divides the numerator of the Bernoulli number B100.

263 cannot be written as a sum of 3 squares. (Integers that are not a sum of three squares)

Factors: 1, 263

Representations, Binary to Hexadecimal:

100000111_2
100202_3
10013_4
2023_5
1115_6
524_7
407_8
322_9
21a_11
19b_12
173_13
14b_14
128_15
107_16

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