79991242 has 16 divisors (see below), whose sum is σ = 122541120. Its totient is φ = 39153312.

The previous prime is 79991183. The next prime is 79991267. The reversal of 79991242 is 24219997.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16153 + ... + 20515.

It is an arithmetic number, because the mean of its divisors is an integer number (7658820).

Almost surely, 2^79991242 is an apocalyptic number.

79991242 is a deficient number, since it is larger than the sum of its proper divisors (42549878).

79991242 is a wasteful number, since it uses less digits than its factorization.

79991242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4557.

The product of its digits is 81648, while the sum is 43.

The square root of 79991242 is about 8943.7823095154. The cubic root of 79991242 is about 430.8712136500.

The spelling of 79991242 in words is "seventy-nine million, nine hundred ninety-one thousand, two hundred forty-two".