257972927 has 2 divisors, whose sum is σ = 257972928. Its totient is φ = 257972926.

The previous prime is 257972921. The next prime is 257972947. The reversal of 257972927 is 729279752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257972927 - 2⁶ = 257972863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257972921) 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, 128986463 + 128986464.

It is an arithmetic number, because the mean of its divisors is an integer number (128986464).

Almost surely, 2^257972927 is an apocalyptic number.

257972927 is a deficient number, since it is larger than the sum of its proper divisors (1).

257972927 is an equidigital number, since it uses as much as digits as its factorization.

257972927 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1111320, while the sum is 50.

The square root of 257972927 is about 16061.5356364203. The cubic root of 257972927 is about 636.5874079065.

The spelling of 257972927 in words is "two hundred fifty-seven million, nine hundred seventy-two thousand, nine hundred twenty-seven".