79208809679 has 4 divisors (see below), whose sum is σ = 80703315576. Its totient is φ = 77714303784.

The previous prime is 79208809657. The next prime is 79208809777. The reversal of 79208809679 is 97690880297.

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 79208809679 - 2²⁴ = 79192032463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79208809639) 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, 747252869 + ... + 747252974.

It is an arithmetic number, because the mean of its divisors is an integer number (20175828894).

Almost surely, 2^79208809679 is an apocalyptic number.

79208809679 is a deficient number, since it is larger than the sum of its proper divisors (1494505897).

79208809679 is a wasteful number, since it uses less digits than its factorization.

79208809679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494505896.

The product of its (nonzero) digits is 27433728, while the sum is 65.

The spelling of 79208809679 in words is "seventy-nine billion, two hundred eight million, eight hundred nine thousand, six hundred seventy-nine".