257268959 has 2 divisors, whose sum is σ = 257268960. Its totient is φ = 257268958.

The previous prime is 257268941. The next prime is 257268989. The reversal of 257268959 is 959862752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257268959 - 2¹² = 257264863 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 257268959.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257268919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128634479 + 128634480.

It is an arithmetic number, because the mean of its divisors is an integer number (128634480).

Almost surely, 2^257268959 is an apocalyptic number.

257268959 is a deficient number, since it is larger than the sum of its proper divisors (1).

257268959 is an equidigital number, since it uses as much as digits as its factorization.

257268959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2721600, while the sum is 53.

The square root of 257268959 is about 16039.6059490251. The cubic root of 257268959 is about 636.0078310482.

The spelling of 257268959 in words is "two hundred fifty-seven million, two hundred sixty-eight thousand, nine hundred fifty-nine".