87679893257 has 6 divisors (see below), whose sum is σ = 96375419994. Its totient is φ = 79708993760.

The previous prime is 87679893251. The next prime is 87679893269. The reversal of 87679893257 is 75239897678.

It can be written as a sum of positive squares in only one way, i.e., 87140678416 + 539214841 = 295196^2 + 23221^2 .

It is not a de Polignac number, because 87679893257 - 2⁸ = 87679893001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87679893251) 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 5 ways as a sum of consecutive naturals, for example, 362313488 + ... + 362313729.

It is an arithmetic number, because the mean of its divisors is an integer number (16062569999).

Almost surely, 2^87679893257 is an apocalyptic number.

It is an amenable number.

87679893257 is a deficient number, since it is larger than the sum of its proper divisors (8695526737).

87679893257 is a wasteful number, since it uses less digits than its factorization.

87679893257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724627239 (or 724627228 counting only the distinct ones).

The product of its digits is 320060160, while the sum is 71.

The spelling of 87679893257 in words is "eighty-seven billion, six hundred seventy-nine million, eight hundred ninety-three thousand, two hundred fifty-seven".