257064959 has 4 divisors (see below), whose sum is σ = 257110080. Its totient is φ = 257019840.

The previous prime is 257064923. The next prime is 257064971. The reversal of 257064959 is 959460752.

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 257064959 - 2¹² = 257060863 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 (257064359) 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, 12527 + ... + 25904.

It is an arithmetic number, because the mean of its divisors is an integer number (64277520).

Almost surely, 2^257064959 is an apocalyptic number.

257064959 is a deficient number, since it is larger than the sum of its proper divisors (45121).

257064959 is an equidigital number, since it uses as much as digits as its factorization.

257064959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45120.

The product of its (nonzero) digits is 680400, while the sum is 47.

The square root of 257064959 is about 16033.2454294195. The cubic root of 257064959 is about 635.8396802967.

The spelling of 257064959 in words is "two hundred fifty-seven million, sixty-four thousand, nine hundred fifty-nine".