257870563 has 2 divisors, whose sum is σ = 257870564. Its totient is φ = 257870562.

The previous prime is 257870551. The next prime is 257870567. The reversal of 257870563 is 365078752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257870563 - 2⁵ = 257870531 is a prime.

It is not a weakly prime, because it can be changed into another prime (257870567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128935281 + 128935282.

It is an arithmetic number, because the mean of its divisors is an integer number (128935282).

Almost surely, 2^257870563 is an apocalyptic number.

257870563 is a deficient number, since it is larger than the sum of its proper divisors (1).

257870563 is an equidigital number, since it uses as much as digits as its factorization.

257870563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 352800, while the sum is 43.

The square root of 257870563 is about 16058.3487009094. The cubic root of 257870563 is about 636.5031971909.

The spelling of 257870563 in words is "two hundred fifty-seven million, eight hundred seventy thousand, five hundred sixty-three".