257496913 has 6 divisors (see below), whose sum is σ = 259892934. Its totient is φ = 255122784.

The previous prime is 257496893. The next prime is 257496917. The reversal of 257496913 is 319694752.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 166332609 + 91164304 = 12897^2 + 9548^2 .

It is not a de Polignac number, because 257496913 - 2⁹ = 257496401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257496917) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1045 + ... + 22717.

It is an arithmetic number, because the mean of its divisors is an integer number (43315489).

Almost surely, 2^257496913 is an apocalyptic number.

It is an amenable number.

257496913 is a deficient number, since it is larger than the sum of its proper divisors (2396021).

257496913 is an equidigital number, since it uses as much as digits as its factorization.

257496913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21891 (or 21782 counting only the distinct ones).

The product of its digits is 408240, while the sum is 46.

The square root of 257496913 is about 16046.7103482303. The cubic root of 257496913 is about 636.1956211992.

The spelling of 257496913 in words is "two hundred fifty-seven million, four hundred ninety-six thousand, nine hundred thirteen".