79999894 has 16 divisors (see below), whose sum is σ = 130489632. Its totient is φ = 36563328.

The previous prime is 79999879. The next prime is 79999973. The reversal of 79999894 is 49899997.

It is a super-2 number, since 2×79999894² = 12799966080022472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12259 + ... + 17614.

It is an arithmetic number, because the mean of its divisors is an integer number (8155602).

Almost surely, 2^79999894 is an apocalyptic number.

79999894 is a deficient number, since it is larger than the sum of its proper divisors (50489738).

79999894 is a wasteful number, since it uses less digits than its factorization.

79999894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29991.

The product of its digits is 13226976, while the sum is 64.

The square root of 79999894 is about 8944.2659844171. The cubic root of 79999894 is about 430.8867476979.

The spelling of 79999894 in words is "seventy-nine million, nine hundred ninety-nine thousand, eight hundred ninety-four".