79439399 has 8 divisors (see below), whose sum is σ = 90053040. Its totient is φ = 69469056.

The previous prime is 79439387. The next prime is 79439431. The reversal of 79439399 is 99393497.

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

It is a cyclic number.

It is not a de Polignac number, because 79439399 - 2¹⁶ = 79373863 is a prime.

It is a super-2 number, since 2×79439399² = 12621236226962402, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79439399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79439369) 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 7 ways as a sum of consecutive naturals, for example, 160562 + ... + 161055.

It is an arithmetic number, because the mean of its divisors is an integer number (11256630).

Almost surely, 2^79439399 is an apocalyptic number.

79439399 is a deficient number, since it is larger than the sum of its proper divisors (10613641).

79439399 is a wasteful number, since it uses less digits than its factorization.

79439399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321649.

The product of its digits is 1653372, while the sum is 53.

The square root of 79439399 is about 8912.8782668676. The cubic root of 79439399 is about 429.8780959647.

The spelling of 79439399 in words is "seventy-nine million, four hundred thirty-nine thousand, three hundred ninety-nine".