79364221 has 4 divisors (see below), whose sum is σ = 79430652. Its totient is φ = 79297792.

The previous prime is 79364209. The next prime is 79364231. The reversal of 79364221 is 12246397.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12246397 = 1637 ⋅7481.

It can be written as a sum of positive squares in 2 ways, for example, as 21436900 + 57927321 = 4630^2 + 7611^2 .

It is a cyclic number.

It is not a de Polignac number, because 79364221 - 2⁵ = 79364189 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 (79364231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31390 + ... + 33823.

It is an arithmetic number, because the mean of its divisors is an integer number (19857663).

Almost surely, 2^79364221 is an apocalyptic number.

It is an amenable number.

79364221 is a deficient number, since it is larger than the sum of its proper divisors (66431).

79364221 is a wasteful number, since it uses less digits than its factorization.

79364221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66430.

The product of its digits is 18144, while the sum is 34.

The square root of 79364221 is about 8908.6598879966. The cubic root of 79364221 is about 429.7424471731.

The spelling of 79364221 in words is "seventy-nine million, three hundred sixty-four thousand, two hundred twenty-one".