79811894 has 8 divisors (see below), whose sum is σ = 126018840. Its totient is φ = 37805616.

The previous prime is 79811861. The next prime is 79811903. The reversal of 79811894 is 49811897.

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

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 3 ways as a sum of consecutive naturals, for example, 1050119 + ... + 1050194.

It is an arithmetic number, because the mean of its divisors is an integer number (15752355).

Almost surely, 2^79811894 is an apocalyptic number.

79811894 is a deficient number, since it is larger than the sum of its proper divisors (46206946).

79811894 is a wasteful number, since it uses less digits than its factorization.

79811894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2100334.

The product of its digits is 145152, while the sum is 47.

The square root of 79811894 is about 8933.7502763397. The cubic root of 79811894 is about 430.5489545550.

The spelling of 79811894 in words is "seventy-nine million, eight hundred eleven thousand, eight hundred ninety-four".