79173969 has 64 divisors (see below), whose sum is σ = 135413760. Its totient is φ = 40124160.

The previous prime is 79173961. The next prime is 79174009. The reversal of 79173969 is 96937197.

It is not a de Polignac number, because 79173969 - 2³ = 79173961 is a prime.

It is a super-2 number, since 2×79173969² = 12537034734425922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79173961) 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 63 ways as a sum of consecutive naturals, for example, 457567 + ... + 457739.

It is an arithmetic number, because the mean of its divisors is an integer number (2115840).

Almost surely, 2^79173969 is an apocalyptic number.

It is an amenable number.

79173969 is a deficient number, since it is larger than the sum of its proper divisors (56239791).

79173969 is a wasteful number, since it uses less digits than its factorization.

79173969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270.

The product of its digits is 642978, while the sum is 51.

The square root of 79173969 is about 8897.9755562712. The cubic root of 79173969 is about 429.3987793869.

The spelling of 79173969 in words is "seventy-nine million, one hundred seventy-three thousand, nine hundred sixty-nine".