257323977 has 12 divisors (see below), whose sum is σ = 387850944. Its totient is φ = 164090520.

The previous prime is 257323967. The next prime is 257323981. The reversal of 257323977 is 779323752.

257323977 is a `hidden beast` number, since 2 + 573 + 2 + 3 + 9 + 77 = 666.

It is not a de Polignac number, because 257323977 - 2¹⁰ = 257322953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (257323907) 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 in 11 ways as a sum of consecutive naturals, for example, 621349 + ... + 621762.

It is an arithmetic number, because the mean of its divisors is an integer number (32320912).

Almost surely, 2^257323977 is an apocalyptic number.

It is an amenable number.

257323977 is a deficient number, since it is larger than the sum of its proper divisors (130526967).

257323977 is a wasteful number, since it uses less digits than its factorization.

257323977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243140 (or 1243137 counting only the distinct ones).

The product of its digits is 555660, while the sum is 45.

The square root of 257323977 is about 16041.3209244127. The cubic root of 257323977 is about 636.0531654262.

The spelling of 257323977 in words is "two hundred fifty-seven million, three hundred twenty-three thousand, nine hundred seventy-seven".