263675257 has 2 divisors, whose sum is σ = 263675258. Its totient is φ = 263675256.

The previous prime is 263675177. The next prime is 263675261. The reversal of 263675257 is 752576362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145540096 + 118135161 = 12064^2 + 10869^2 .

It is a cyclic number.

It is not a de Polignac number, because 263675257 - 2²⁷ = 129457529 is a prime.

It is not a weakly prime, because it can be changed into another prime (263675267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131837628 + 131837629.

It is an arithmetic number, because the mean of its divisors is an integer number (131837629).

Almost surely, 2^263675257 is an apocalyptic number.

It is an amenable number.

263675257 is a deficient number, since it is larger than the sum of its proper divisors (1).

263675257 is an equidigital number, since it uses as much as digits as its factorization.

263675257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 529200, while the sum is 43.

The square root of 263675257 is about 16238.0804592168. The cubic root of 263675257 is about 641.2437216281.

The spelling of 263675257 in words is "two hundred sixty-three million, six hundred seventy-five thousand, two hundred fifty-seven".