79930221 has 48 divisors (see below), whose sum is σ = 132378624. Its totient is φ = 42674016.

The previous prime is 79930187. The next prime is 79930223. The reversal of 79930221 is 12203997.

It is not a de Polignac number, because 79930221 - 2⁶ = 79930157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79930223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 158656 + ... + 159158.

It is an arithmetic number, because the mean of its divisors is an integer number (2757888).

Almost surely, 2^79930221 is an apocalyptic number.

It is an amenable number.

79930221 is a deficient number, since it is larger than the sum of its proper divisors (52448403).

79930221 is a wasteful number, since it uses less digits than its factorization.

79930221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590 (or 583 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 79930221 is about 8940.3702943446. The cubic root of 79930221 is about 430.7616229826.

The spelling of 79930221 in words is "seventy-nine million, nine hundred thirty thousand, two hundred twenty-one".