79979157 has 20 divisors (see below), whose sum is σ = 121166496. Its totient is φ = 52564680.

The previous prime is 79979153. The next prime is 79979197. The reversal of 79979157 is 75197997.

It is not a de Polignac number, because 79979157 - 2² = 79979153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79979153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1203 + ... + 12704.

Almost surely, 2^79979157 is an apocalyptic number.

It is an amenable number.

79979157 is a deficient number, since it is larger than the sum of its proper divisors (41187339).

79979157 is a wasteful number, since it uses less digits than its factorization.

79979157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13990 (or 13981 counting only the distinct ones).

The product of its digits is 1250235, while the sum is 54.

The square root of 79979157 is about 8943.1066749760. The cubic root of 79979157 is about 430.8495140209.

The spelling of 79979157 in words is "seventy-nine million, nine hundred seventy-nine thousand, one hundred fifty-seven".