76678979 has 16 divisors (see below), whose sum is σ = 85053024. Its totient is φ = 68678400.

The previous prime is 76678967. The next prime is 76678991. The reversal of 76678979 is 97987667.

It is an interprime number because it is at equal distance from previous prime (76678967) and next prime (76678991).

It is a cyclic number.

It is not a de Polignac number, because 76678979 - 2²⁰ = 75630403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (76678379) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155924 + ... + 156414.

It is an arithmetic number, because the mean of its divisors is an integer number (5315814).

Almost surely, 2^76678979 is an apocalyptic number.

76678979 is a deficient number, since it is larger than the sum of its proper divisors (8374045).

76678979 is a wasteful number, since it uses less digits than its factorization.

76678979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838.

The product of its digits is 8001504, while the sum is 59.

The square root of 76678979 is about 8756.6534132624. The cubic root of 76678979 is about 424.8400394559.

The spelling of 76678979 in words is "seventy-six million, six hundred seventy-eight thousand, nine hundred seventy-nine".