257356963 has 2 divisors, whose sum is σ = 257356964. Its totient is φ = 257356962.

The previous prime is 257356961. The next prime is 257356969. The reversal of 257356963 is 369653752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257356963 - 2¹ = 257356961 is a prime.

Together with 257356961, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (257356961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128678481 + 128678482.

It is an arithmetic number, because the mean of its divisors is an integer number (128678482).

Almost surely, 2^257356963 is an apocalyptic number.

257356963 is a deficient number, since it is larger than the sum of its proper divisors (1).

257356963 is an equidigital number, since it uses as much as digits as its factorization.

257356963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1020600, while the sum is 46.

The square root of 257356963 is about 16042.3490486898. The cubic root of 257356963 is about 636.0803425197.

It can be divided in two parts, 2573 and 56963, that added together give a square (59536 = 244²).

The spelling of 257356963 in words is "two hundred fifty-seven million, three hundred fifty-six thousand, nine hundred sixty-three".