79977842 has 8 divisors (see below), whose sum is σ = 137104896. Its totient is φ = 34276212.

The previous prime is 79977829. The next prime is 79977847. The reversal of 79977842 is 24877997.

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

It is not an unprimeable number, because it can be changed into a prime (79977847) by changing a digit.

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, 2856338 + ... + 2856365.

It is an arithmetic number, because the mean of its divisors is an integer number (17138112).

Almost surely, 2^79977842 is an apocalyptic number.

79977842 is a deficient number, since it is larger than the sum of its proper divisors (57127054).

79977842 is a wasteful number, since it uses less digits than its factorization.

79977842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5712712.

The product of its digits is 1778112, while the sum is 53.

The square root of 79977842 is about 8943.0331543610. The cubic root of 79977842 is about 430.8471526964.

The spelling of 79977842 in words is "seventy-nine million, nine hundred seventy-seven thousand, eight hundred forty-two".