256608959 has 2 divisors, whose sum is σ = 256608960. Its totient is φ = 256608958.

The previous prime is 256608901. The next prime is 256608967. The reversal of 256608959 is 959806652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256608959 - 2¹⁶ = 256543423 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256602959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128304479 + 128304480.

It is an arithmetic number, because the mean of its divisors is an integer number (128304480).

Almost surely, 2^256608959 is an apocalyptic number.

256608959 is a deficient number, since it is larger than the sum of its proper divisors (1).

256608959 is an equidigital number, since it uses as much as digits as its factorization.

256608959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1166400, while the sum is 50.

The square root of 256608959 is about 16019.0186653240. The cubic root of 256608959 is about 635.4634919786.

The spelling of 256608959 in words is "two hundred fifty-six million, six hundred eight thousand, nine hundred fifty-nine".