79964039 has 4 divisors (see below), whose sum is σ = 84667824. Its totient is φ = 75260256.

The previous prime is 79964033. The next prime is 79964069. The reversal of 79964039 is 93046997.

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 79964039 - 2⁸ = 79963783 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79963984 and 79964002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79964033) 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, 2351867 + ... + 2351900.

It is an arithmetic number, because the mean of its divisors is an integer number (21166956).

Almost surely, 2^79964039 is an apocalyptic number.

79964039 is a deficient number, since it is larger than the sum of its proper divisors (4703785).

79964039 is a wasteful number, since it uses less digits than its factorization.

79964039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4703784.

The product of its (nonzero) digits is 367416, while the sum is 47.

The square root of 79964039 is about 8942.2614030233. The cubic root of 79964039 is about 430.8223653084.

The spelling of 79964039 in words is "seventy-nine million, nine hundred sixty-four thousand, thirty-nine".