257945959 has 2 divisors, whose sum is σ = 257945960. Its totient is φ = 257945958.

The previous prime is 257945951. The next prime is 257945977. The reversal of 257945959 is 959549752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257945959 - 2³ = 257945951 is a prime.

It is a super-2 number, since 2×257945959² = 133072235528859362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257945951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128972979 + 128972980.

It is an arithmetic number, because the mean of its divisors is an integer number (128972980).

Almost surely, 2^257945959 is an apocalyptic number.

257945959 is a deficient number, since it is larger than the sum of its proper divisors (1).

257945959 is an equidigital number, since it uses as much as digits as its factorization.

257945959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5103000, while the sum is 55.

The square root of 257945959 is about 16060.6960932582. The cubic root of 257945959 is about 636.5652245871.

The spelling of 257945959 in words is "two hundred fifty-seven million, nine hundred forty-five thousand, nine hundred fifty-nine".