76864857 has 4 divisors (see below), whose sum is σ = 102486480. Its totient is φ = 51243236.

The previous prime is 76864831. The next prime is 76864901. The reversal of 76864857 is 75846867.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 76864857 - 2⁶ = 76864793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (76864057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12810807 + ... + 12810812.

It is an arithmetic number, because the mean of its divisors is an integer number (25621620).

Almost surely, 2^76864857 is an apocalyptic number.

It is an amenable number.

76864857 is a deficient number, since it is larger than the sum of its proper divisors (25621623).

76864857 is a wasteful number, since it uses less digits than its factorization.

76864857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25621622.

The product of its digits is 2257920, while the sum is 51.

The square root of 76864857 is about 8767.2605185428. The cubic root of 76864857 is about 425.1830482544.

The spelling of 76864857 in words is "seventy-six million, eight hundred sixty-four thousand, eight hundred fifty-seven".