257938983 has 24 divisors (see below), whose sum is σ = 382221840. Its totient is φ = 167529600.

The previous prime is 257938979. The next prime is 257938991. The reversal of 257938983 is 389839752.

It is a happy number.

257938983 is a `hidden beast` number, since 257 + 9 + 389 + 8 + 3 = 666.

It is not a de Polignac number, because 257938983 - 2² = 257938979 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257938183) 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 in 23 ways as a sum of consecutive naturals, for example, 232033 + ... + 233141.

It is an arithmetic number, because the mean of its divisors is an integer number (15925910).

Almost surely, 2^257938983 is an apocalyptic number.

257938983 is a deficient number, since it is larger than the sum of its proper divisors (124282857).

257938983 is a wasteful number, since it uses less digits than its factorization.

257938983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1759 (or 1756 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 257938983 is about 16060.4789156488. The cubic root of 257938983 is about 636.5594860220.

The spelling of 257938983 in words is "two hundred fifty-seven million, nine hundred thirty-eight thousand, nine hundred eighty-three".