257888263 has 4 divisors (see below), whose sum is σ = 258155920. Its totient is φ = 257620608.

The previous prime is 257888251. The next prime is 257888291. The reversal of 257888263 is 362888752.

It is a happy number.

257888263 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 257888263 - 2⁵ = 257888231 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 (257888203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132378 + ... + 134311.

It is an arithmetic number, because the mean of its divisors is an integer number (64538980).

Almost surely, 2^257888263 is an apocalyptic number.

257888263 is a deficient number, since it is larger than the sum of its proper divisors (267657).

257888263 is an equidigital number, since it uses as much as digits as its factorization.

257888263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267656.

The product of its digits is 1290240, while the sum is 49.

The square root of 257888263 is about 16058.8998066493. The cubic root of 257888263 is about 636.5177598572.

The spelling of 257888263 in words is "two hundred fifty-seven million, eight hundred eighty-eight thousand, two hundred sixty-three".