79368113221 has 4 divisors (see below), whose sum is σ = 79843371552. Its totient is φ = 78892854892.

The previous prime is 79368113191. The next prime is 79368113257. The reversal of 79368113221 is 12231186397.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 79368113221 - 2⁵ = 79368113189 is a prime.

It is a super-2 number, since 2×79368113221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79368113821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237628915 + ... + 237629248.

It is an arithmetic number, because the mean of its divisors is an integer number (19960842888).

Almost surely, 2^79368113221 is an apocalyptic number.

It is an amenable number.

79368113221 is a deficient number, since it is larger than the sum of its proper divisors (475258331).

79368113221 is a wasteful number, since it uses less digits than its factorization.

79368113221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475258330.

The product of its digits is 108864, while the sum is 43.

The spelling of 79368113221 in words is "seventy-nine billion, three hundred sixty-eight million, one hundred thirteen thousand, two hundred twenty-one".