79907746 has 4 divisors (see below), whose sum is σ = 119861622. Its totient is φ = 39953872.

The previous prime is 79907741. The next prime is 79907747. The reversal of 79907746 is 64770997.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 79905721 + 2025 = 8939^2 + 45^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 79907746.

It is not an unprimeable number, because it can be changed into a prime (79907741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19976935 + ... + 19976938.

Almost surely, 2^79907746 is an apocalyptic number.

79907746 is a deficient number, since it is larger than the sum of its proper divisors (39953876).

79907746 is a wasteful number, since it uses less digits than its factorization.

79907746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39953875.

The product of its (nonzero) digits is 666792, while the sum is 49.

The square root of 79907746 is about 8939.1132669857. The cubic root of 79907746 is about 430.7212449508.

The spelling of 79907746 in words is "seventy-nine million, nine hundred seven thousand, seven hundred forty-six".