257074863 has 8 divisors (see below), whose sum is σ = 342855168. Its totient is φ = 171338904.

The previous prime is 257074861. The next prime is 257074871. The reversal of 257074863 is 368470752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 257074863 - 2¹ = 257074861 is a prime.

It is a super-3 number, since 3×257074863³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257074861) 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 7 ways as a sum of consecutive naturals, for example, 6370 + ... + 23552.

It is an arithmetic number, because the mean of its divisors is an integer number (42856896).

Almost surely, 2^257074863 is an apocalyptic number.

257074863 is a deficient number, since it is larger than the sum of its proper divisors (85780305).

257074863 is a wasteful number, since it uses less digits than its factorization.

257074863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22173.

The product of its (nonzero) digits is 282240, while the sum is 42.

The square root of 257074863 is about 16033.5542846868. The cubic root of 257074863 is about 635.8478459051.

The spelling of 257074863 in words is "two hundred fifty-seven million, seventy-four thousand, eight hundred sixty-three".