79982109 has 24 divisors (see below), whose sum is σ = 123132672. Its totient is φ = 49911840.

The previous prime is 79982101. The next prime is 79982137. The reversal of 79982109 is 90128997.

It is not a de Polignac number, because 79982109 - 2³ = 79982101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79982101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5619 + ... + 13839.

It is an arithmetic number, because the mean of its divisors is an integer number (5130528).

Almost surely, 2^79982109 is an apocalyptic number.

It is an amenable number.

79982109 is a deficient number, since it is larger than the sum of its proper divisors (43150563).

79982109 is a wasteful number, since it uses less digits than its factorization.

79982109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8297 (or 8294 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 79982109 is about 8943.2717167712. The cubic root of 79982109 is about 430.8548147857.

The spelling of 79982109 in words is "seventy-nine million, nine hundred eighty-two thousand, one hundred nine".