79999942 has 8 divisors (see below), whose sum is σ = 130909032. Its totient is φ = 36363600.

The previous prime is 79999879. The next prime is 79999973. The reversal of 79999942 is 24999997.

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, 1818159 + ... + 1818202.

It is an arithmetic number, because the mean of its divisors is an integer number (16363629).

Almost surely, 2^79999942 is an apocalyptic number.

79999942 is a deficient number, since it is larger than the sum of its proper divisors (50909090).

79999942 is a wasteful number, since it uses less digits than its factorization.

79999942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3636374.

The product of its digits is 3306744, while the sum is 58.

The square root of 79999942 is about 8944.2686677000. The cubic root of 79999942 is about 430.8868338753.

Subtracting from 79999942 its reverse (24999997), we obtain a palindrome (54999945).

The spelling of 79999942 in words is "seventy-nine million, nine hundred ninety-nine thousand, nine hundred forty-two".