79365221 has 16 divisors (see below), whose sum is σ = 87865344. Its totient is φ = 71233344.

The previous prime is 79365179. The next prime is 79365263. The reversal of 79365221 is 12256397.

It is an interprime number because it is at equal distance from previous prime (79365179) and next prime (79365263).

It is a de Polignac number, because none of the positive numbers 2^k-79365221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79365421) 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, 87050 + ... + 87956.

It is an arithmetic number, because the mean of its divisors is an integer number (5491584).

Almost surely, 2^79365221 is an apocalyptic number.

It is an amenable number.

79365221 is a deficient number, since it is larger than the sum of its proper divisors (8500123).

79365221 is a wasteful number, since it uses less digits than its factorization.

79365221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100.

The product of its digits is 22680, while the sum is 35.

The square root of 79365221 is about 8908.7160129841. The cubic root of 79365221 is about 429.7442521033.

The spelling of 79365221 in words is "seventy-nine million, three hundred sixty-five thousand, two hundred twenty-one".