79679971 has 16 divisors (see below), whose sum is σ = 92574720. Its totient is φ = 67173120.

The previous prime is 79679959. The next prime is 79679983. The reversal of 79679971 is 17997697.

It is an interprime number because it is at equal distance from previous prime (79679959) and next prime (79679983).

It is a de Polignac number, because none of the positive numbers 2^k-79679971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79679921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162036 + ... + 162526.

It is an arithmetic number, because the mean of its divisors is an integer number (5785920).

Almost surely, 2^79679971 is an apocalyptic number.

79679971 is a deficient number, since it is larger than the sum of its proper divisors (12894749).

79679971 is a wasteful number, since it uses less digits than its factorization.

79679971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834.

The product of its digits is 1500282, while the sum is 55.

The square root of 79679971 is about 8926.3638173671. The cubic root of 79679971 is about 430.3116021562.

The spelling of 79679971 in words is "seventy-nine million, six hundred seventy-nine thousand, nine hundred seventy-one".