79916913 has 12 divisors (see below), whose sum is σ = 118251588. Its totient is φ = 51978240.

The previous prime is 79916897. The next prime is 79916933. The reversal of 79916913 is 31961997.

It can be written as a sum of positive squares in 2 ways, for example, as 10810944 + 69105969 = 3288^2 + 8313^2 .

It is not a de Polignac number, because 79916913 - 2⁴ = 79916897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79916933) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107920 + ... + 108657.

It is an arithmetic number, because the mean of its divisors is an integer number (9854299).

Almost surely, 2^79916913 is an apocalyptic number.

It is an amenable number.

79916913 is a deficient number, since it is larger than the sum of its proper divisors (38334675).

79916913 is a wasteful number, since it uses less digits than its factorization.

79916913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216624 (or 216621 counting only the distinct ones).

The product of its digits is 91854, while the sum is 45.

The square root of 79916913 is about 8939.6259988883. The cubic root of 79916913 is about 430.7377150715.

The spelling of 79916913 in words is "seventy-nine million, nine hundred sixteen thousand, nine hundred thirteen".