79979446 has 4 divisors (see below), whose sum is σ = 119969172. Its totient is φ = 39989722.

The previous prime is 79979437. The next prime is 79979447. The reversal of 79979446 is 64497997.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64497997 = 197 ⋅327401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79979447) 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 as a sum of consecutive naturals, namely, 19994860 + ... + 19994863.

It is an arithmetic number, because the mean of its divisors is an integer number (29992293).

Almost surely, 2^79979446 is an apocalyptic number.

79979446 is a deficient number, since it is larger than the sum of its proper divisors (39989726).

79979446 is a wasteful number, since it uses less digits than its factorization.

79979446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39989725.

The product of its digits is 3429216, while the sum is 55.

The square root of 79979446 is about 8943.1228326575. The cubic root of 79979446 is about 430.8500329701.

The spelling of 79979446 in words is "seventy-nine million, nine hundred seventy-nine thousand, four hundred forty-six".