79439967 has 8 divisors (see below), whose sum is σ = 117688880. Its totient is φ = 52959960.

The previous prime is 79439947. The next prime is 79439977. The reversal of 79439967 is 76993497.

It is not a de Polignac number, because 79439967 - 2⁷ = 79439839 is a prime.

It is a super-2 number, since 2×79439967² = 12621416713922178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79439947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1471084 + ... + 1471137.

It is an arithmetic number, because the mean of its divisors is an integer number (14711110).

Almost surely, 2^79439967 is an apocalyptic number.

79439967 is a deficient number, since it is larger than the sum of its proper divisors (38248913).

79439967 is a wasteful number, since it uses less digits than its factorization.

79439967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2942230 (or 2942224 counting only the distinct ones).

The product of its digits is 2571912, while the sum is 54.

The square root of 79439967 is about 8912.9101308159. The cubic root of 79439967 is about 429.8791205201.

The spelling of 79439967 in words is "seventy-nine million, four hundred thirty-nine thousand, nine hundred sixty-seven".