257675487 has 8 divisors (see below), whose sum is σ = 344489904. Its totient is φ = 171322368.

The previous prime is 257675461. The next prime is 257675497. The reversal of 257675487 is 784576752.

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

It is not a de Polignac number, because 257675487 - 2⁶ = 257675423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257675497) 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 7 ways as a sum of consecutive naturals, for example, 114018 + ... + 116255.

It is an arithmetic number, because the mean of its divisors is an integer number (43061238).

Almost surely, 2^257675487 is an apocalyptic number.

257675487 is a deficient number, since it is larger than the sum of its proper divisors (86814417).

257675487 is a wasteful number, since it uses less digits than its factorization.

257675487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230649.

The product of its digits is 3292800, while the sum is 51.

The square root of 257675487 is about 16052.2735772849. The cubic root of 257675487 is about 636.3426543465.

The spelling of 257675487 in words is "two hundred fifty-seven million, six hundred seventy-five thousand, four hundred eighty-seven".