257392623 has 4 divisors (see below), whose sum is σ = 343190168. Its totient is φ = 171595080.

The previous prime is 257392613. The next prime is 257392651. The reversal of 257392623 is 326293752.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 257392623 - 2⁴ = 257392607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257392613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42898768 + ... + 42898773.

It is an arithmetic number, because the mean of its divisors is an integer number (85797542).

Almost surely, 2^257392623 is an apocalyptic number.

257392623 is a deficient number, since it is larger than the sum of its proper divisors (85797545).

257392623 is an equidigital number, since it uses as much as digits as its factorization.

257392623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85797544.

The product of its digits is 136080, while the sum is 39.

The square root of 257392623 is about 16043.4604434330. The cubic root of 257392623 is about 636.1097201037.

The spelling of 257392623 in words is "two hundred fifty-seven million, three hundred ninety-two thousand, six hundred twenty-three".