79819970 has 16 divisors (see below), whose sum is σ = 143796600. Its totient is φ = 31901184.

The previous prime is 79819963. The next prime is 79819991. The reversal of 79819970 is 7991897.

It can be written as a sum of positive squares in 4 ways, for example, as 62837329 + 16982641 = 7927^2 + 4121^2 .

It is a super-2 number, since 2×79819970² = 12742455221601800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12914 + ... + 18066.

Almost surely, 2^79819970 is an apocalyptic number.

79819970 is a deficient number, since it is larger than the sum of its proper divisors (63976630).

79819970 is a wasteful number, since it uses less digits than its factorization.

79819970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6709.

The product of its (nonzero) digits is 285768, while the sum is 50.

The square root of 79819970 is about 8934.2022587358. The cubic root of 79819970 is about 430.5634761837.

The spelling of 79819970 in words is "seventy-nine million, eight hundred nineteen thousand, nine hundred seventy".