257630613 has 32 divisors (see below), whose sum is σ = 366551040. Its totient is φ = 160617600.

The previous prime is 257630609. The next prime is 257630617. The reversal of 257630613 is 316036752.

It is an interprime number because it is at equal distance from previous prime (257630609) and next prime (257630617).

It is not a de Polignac number, because 257630613 - 2² = 257630609 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257630617) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 822945 + ... + 823257.

It is an arithmetic number, because the mean of its divisors is an integer number (11454720).

Almost surely, 2^257630613 is an apocalyptic number.

257630613 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

257630613 is a deficient number, since it is larger than the sum of its proper divisors (108920427).

257630613 is a wasteful number, since it uses less digits than its factorization.

257630613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569.

The product of its (nonzero) digits is 22680, while the sum is 33.

The square root of 257630613 is about 16050.8757704993. The cubic root of 257630613 is about 636.3057126641.

The spelling of 257630613 in words is "two hundred fifty-seven million, six hundred thirty thousand, six hundred thirteen".