79920842 has 8 divisors (see below), whose sum is σ = 126933156. Its totient is φ = 37609792.

The previous prime is 79920833. The next prime is 79920857. The reversal of 79920842 is 24802997.

It can be written as a sum of positive squares in 2 ways, for example, as 78127921 + 1792921 = 8839^2 + 1339^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 79920842.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1175273 + ... + 1175340.

Almost surely, 2^79920842 is an apocalyptic number.

79920842 is a deficient number, since it is larger than the sum of its proper divisors (47012314).

79920842 is a wasteful number, since it uses less digits than its factorization.

79920842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2350632.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 79920842 is about 8939.8457481100. The cubic root of 79920842 is about 430.7447738224.

The spelling of 79920842 in words is "seventy-nine million, nine hundred twenty thousand, eight hundred forty-two".