79976709 has 6 divisors (see below), whose sum is σ = 115521926. Its totient is φ = 53317800.

The previous prime is 79976669. The next prime is 79976711. The reversal of 79976709 is 90767997.

It can be written as a sum of positive squares in only one way, i.e., 77264100 + 2712609 = 8790^2 + 1647^2 .

It is not a de Polignac number, because 79976709 - 2²⁰ = 78928133 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 (79976779) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4443142 + ... + 4443159.

Almost surely, 2^79976709 is an apocalyptic number.

It is an amenable number.

79976709 is a deficient number, since it is larger than the sum of its proper divisors (35545217).

79976709 is a wasteful number, since it uses less digits than its factorization.

79976709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8886307 (or 8886304 counting only the distinct ones).

The product of its (nonzero) digits is 1500282, while the sum is 54.

The square root of 79976709 is about 8942.9698087380. The cubic root of 79976709 is about 430.8451181657.

It can be divided in two parts, 7997 and 6709, that added together give a triangular number (14706 = T₁₇₁).

The spelling of 79976709 in words is "seventy-nine million, nine hundred seventy-six thousand, seven hundred nine".