79639722 has 12 divisors (see below), whose sum is σ = 172552770. Its totient is φ = 26546568.

The previous prime is 79639699. The next prime is 79639723. The reversal of 79639722 is 22793697.

It is a happy number.

79639722 is a `hidden beast` number, since 7 + 9 + 639 + 7 + 2 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 75012921 + 4626801 = 8661^2 + 2151^2 .

It is not an unprimeable number, because it can be changed into a prime (79639723) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2212197 + ... + 2212232.

Almost surely, 2^79639722 is an apocalyptic number.

79639722 is an abundant number, since it is smaller than the sum of its proper divisors (92913048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79639722 is a wasteful number, since it uses less digits than its factorization.

79639722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4424437 (or 4424434 counting only the distinct ones).

The product of its digits is 285768, while the sum is 45.

The square root of 79639722 is about 8924.1090311582. The cubic root of 79639722 is about 430.2391350585.

The spelling of 79639722 in words is "seventy-nine million, six hundred thirty-nine thousand, seven hundred twenty-two".