257792863 has 6 divisors (see below), whose sum is σ = 258846224. Its totient is φ = 256743756.

The previous prime is 257792851. The next prime is 257792867. The reversal of 257792863 is 368297752.

It is a de Polignac number, because none of the positive numbers 2^k-257792863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257792867) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67306 + ... + 71032.

Almost surely, 2^257792863 is an apocalyptic number.

257792863 is a deficient number, since it is larger than the sum of its proper divisors (1053361).

257792863 is an frugal number, since it uses more digits than its factorization.

257792863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4253 (or 3990 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 49.

The square root of 257792863 is about 16055.9292163363. The cubic root of 257792863 is about 636.4392616697.

The spelling of 257792863 in words is "two hundred fifty-seven million, seven hundred ninety-two thousand, eight hundred sixty-three".