764678979 has 12 divisors (see below), whose sum is σ = 1115473632. Its totient is φ = 504738000.

The previous prime is 764678969. The next prime is 764678983. The reversal of 764678979 is 979876467.

It is not a de Polignac number, because 764678979 - 2²⁸ = 496243523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (764678909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 419707 + ... + 421524.

It is an arithmetic number, because the mean of its divisors is an integer number (92956136).

Almost surely, 2^764678979 is an apocalyptic number.

764678979 is a deficient number, since it is larger than the sum of its proper divisors (350794653).

764678979 is a wasteful number, since it uses less digits than its factorization.

764678979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841338 (or 841335 counting only the distinct ones).

The product of its digits is 32006016, while the sum is 63.

The square root of 764678979 is about 27652.8294935618. The cubic root of 764678979 is about 914.4494798224.

The spelling of 764678979 in words is "seven hundred sixty-four million, six hundred seventy-eight thousand, nine hundred seventy-nine".