257993075 has 6 divisors (see below), whose sum is σ = 319911444. Its totient is φ = 206394440.

The previous prime is 257993063. The next prime is 257993083. The reversal of 257993075 is 570399752.

It is a de Polignac number, because none of the positive numbers 2^k-257993075 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5159837 + ... + 5159886.

It is an arithmetic number, because the mean of its divisors is an integer number (53318574).

Almost surely, 2^257993075 is an apocalyptic number.

257993075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

257993075 is a deficient number, since it is larger than the sum of its proper divisors (61918369).

257993075 is a wasteful number, since it uses less digits than its factorization.

257993075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10319733 (or 10319728 counting only the distinct ones).

The product of its (nonzero) digits is 595350, while the sum is 47.

The square root of 257993075 is about 16062.1628369283. The cubic root of 257993075 is about 636.6039802259.

The spelling of 257993075 in words is "two hundred fifty-seven million, nine hundred ninety-three thousand, seventy-five".