8639932379 has 4 divisors (see below), whose sum is σ = 9304542576. Its totient is φ = 7975322184.

The previous prime is 8639932351. The next prime is 8639932391. The reversal of 8639932379 is 9732399368.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8639932379 - 2³² = 4344965083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8639932979) 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, 332305079 + ... + 332305104.

It is an arithmetic number, because the mean of its divisors is an integer number (2326135644).

Almost surely, 2^8639932379 is an apocalyptic number.

8639932379 is a deficient number, since it is larger than the sum of its proper divisors (664610197).

8639932379 is a wasteful number, since it uses less digits than its factorization.

8639932379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664610196.

The product of its digits is 13226976, while the sum is 59.

The square root of 8639932379 is about 92951.2365652012. The cubic root of 8639932379 is about 2051.9657827442.

The spelling of 8639932379 in words is "eight billion, six hundred thirty-nine million, nine hundred thirty-two thousand, three hundred seventy-nine".