257290023 has 4 divisors (see below), whose sum is σ = 343053368. Its totient is φ = 171526680.

The previous prime is 257289961. The next prime is 257290043. The reversal of 257290023 is 320092752.

It is a happy number.

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

It is not a de Polignac number, because 257290023 - 2²² = 253095719 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 (257290043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42881668 + ... + 42881673.

It is an arithmetic number, because the mean of its divisors is an integer number (85763342).

Almost surely, 2^257290023 is an apocalyptic number.

257290023 is a deficient number, since it is larger than the sum of its proper divisors (85763345).

257290023 is an equidigital number, since it uses as much as digits as its factorization.

257290023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85763344.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 257290023 is about 16040.2625601952. The cubic root of 257290023 is about 636.0251883739.

The spelling of 257290023 in words is "two hundred fifty-seven million, two hundred ninety thousand, twenty-three".