79637399 has 4 divisors (see below), whose sum is σ = 80126136. Its totient is φ = 79148664.

The previous prime is 79637387. The next prime is 79637407. The reversal of 79637399 is 99373697.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99373697 = 61 ⋅1629077.

It is a cyclic number.

It is not a de Polignac number, because 79637399 - 2⁸ = 79637143 is a prime.

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 79637399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79637309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 244124 + ... + 244449.

It is an arithmetic number, because the mean of its divisors is an integer number (20031534).

Almost surely, 2^79637399 is an apocalyptic number.

79637399 is a deficient number, since it is larger than the sum of its proper divisors (488737).

79637399 is a wasteful number, since it uses less digits than its factorization.

79637399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488736.

The product of its digits is 1928934, while the sum is 53.

The square root of 79637399 is about 8923.9788771601. The cubic root of 79637399 is about 430.2349518226.

The spelling of 79637399 in words is "seventy-nine million, six hundred thirty-seven thousand, three hundred ninety-nine".