79664413 has 4 divisors (see below), whose sum is σ = 79761340. Its totient is φ = 79567488.

The previous prime is 79664399. The next prime is 79664419. The reversal of 79664413 is 31446697.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31446697 = 1553 ⋅20249.

It can be written as a sum of positive squares in 2 ways, for example, as 19027044 + 60637369 = 4362^2 + 7787^2 .

It is a cyclic number.

It is not a de Polignac number, because 79664413 - 2⁹ = 79663901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79664419) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47220 + ... + 48877.

It is an arithmetic number, because the mean of its divisors is an integer number (19940335).

Almost surely, 2^79664413 is an apocalyptic number.

It is an amenable number.

79664413 is a deficient number, since it is larger than the sum of its proper divisors (96927).

79664413 is an equidigital number, since it uses as much as digits as its factorization.

79664413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96926.

The product of its digits is 108864, while the sum is 40.

The square root of 79664413 is about 8925.4923113518. The cubic root of 79664413 is about 430.2835933454.

The spelling of 79664413 in words is "seventy-nine million, six hundred sixty-four thousand, four hundred thirteen".