79955997 has 16 divisors (see below), whose sum is σ = 117143040. Its totient is φ = 48106800.

The previous prime is 79955957. The next prime is 79956007.

79955997 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 79955997 - 2¹⁸ = 79693853 is a prime.

It is a super-2 number, since 2×79955997² = 12785922912528018, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 79955997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79955917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4129 + ... + 13302.

It is an arithmetic number, because the mean of its divisors is an integer number (7321440).

Almost surely, 2^79955997 is an apocalyptic number.

It is an amenable number.

79955997 is a deficient number, since it is larger than the sum of its proper divisors (37187043).

79955997 is a wasteful number, since it uses less digits than its factorization.

79955997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17584.

The product of its digits is 8037225, while the sum is 60.

The square root of 79955997 is about 8941.8117291744. The cubic root of 79955997 is about 430.8079221927.

The spelling of 79955997 in words is "seventy-nine million, nine hundred fifty-five thousand, nine hundred ninety-seven".