257953963 has 2 divisors, whose sum is σ = 257953964. Its totient is φ = 257953962.

The previous prime is 257953961. The next prime is 257953981. The reversal of 257953963 is 369359752.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257953963 - 2¹ = 257953961 is a prime.

Together with 257953961, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (257953961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128976981 + 128976982.

It is an arithmetic number, because the mean of its divisors is an integer number (128976982).

Almost surely, 2^257953963 is an apocalyptic number.

257953963 is a deficient number, since it is larger than the sum of its proper divisors (1).

257953963 is an equidigital number, since it uses as much as digits as its factorization.

257953963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1530900, while the sum is 49.

The square root of 257953963 is about 16060.9452710605. The cubic root of 257953963 is about 636.5718086734.

The spelling of 257953963 in words is "two hundred fifty-seven million, nine hundred fifty-three thousand, nine hundred sixty-three".