79697990 has 32 divisors (see below), whose sum is σ = 150232320. Its totient is φ = 30383584.

The previous prime is 79697983. The next prime is 79698007. The reversal of 79697990 is 9979697.

It is a super-2 number, since 2×79697990² = 12703539220080200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95957 + ... + 96783.

It is an arithmetic number, because the mean of its divisors is an integer number (4694760).

Almost surely, 2^79697990 is an apocalyptic number.

79697990 is a deficient number, since it is larger than the sum of its proper divisors (70534330).

79697990 is a wasteful number, since it uses less digits than its factorization.

79697990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276.

The product of its (nonzero) digits is 1928934, while the sum is 56.

The square root of 79697990 is about 8927.3730738667. The cubic root of 79697990 is about 430.3440369084.

The spelling of 79697990 in words is "seventy-nine million, six hundred ninety-seven thousand, nine hundred ninety".