79709816 has 8 divisors (see below), whose sum is σ = 149455920. Its totient is φ = 39854904.

The previous prime is 79709809. The next prime is 79709843. The reversal of 79709816 is 61890797.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4981856 + ... + 4981871.

It is an arithmetic number, because the mean of its divisors is an integer number (18681990).

Almost surely, 2^79709816 is an apocalyptic number.

It is an amenable number.

79709816 is a deficient number, since it is larger than the sum of its proper divisors (69746104).

79709816 is a wasteful number, since it uses less digits than its factorization.

79709816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9963733 (or 9963729 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 47.

The square root of 79709816 is about 8928.0353941951. The cubic root of 79709816 is about 430.3653214137.

The spelling of 79709816 in words is "seventy-nine million, seven hundred nine thousand, eight hundred sixteen".