79664873 has 6 divisors (see below), whose sum is σ = 84627006. Its totient is φ = 74978432.

The previous prime is 79664833. The next prime is 79664881. The reversal of 79664873 is 37846697.

It can be written as a sum of positive squares in 3 ways, for example, as 26491609 + 53173264 = 5147^2 + 7292^2 .

It is not a de Polignac number, because 79664873 - 2¹⁶ = 79599337 is a prime.

It is a super-2 number, since 2×79664873² = 12692983980212258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79664833) 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 5 ways as a sum of consecutive naturals, for example, 137540 + ... + 138117.

It is an arithmetic number, because the mean of its divisors is an integer number (14104501).

Almost surely, 2^79664873 is an apocalyptic number.

It is an amenable number.

79664873 is a deficient number, since it is larger than the sum of its proper divisors (4962133).

79664873 is a wasteful number, since it uses less digits than its factorization.

79664873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275691 (or 275674 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 50.

The square root of 79664873 is about 8925.5180802013. The cubic root of 79664873 is about 430.2844215281.

The spelling of 79664873 in words is "seventy-nine million, six hundred sixty-four thousand, eight hundred seventy-three".