79657339 has 4 divisors (see below), whose sum is σ = 81352224. Its totient is φ = 77962456.

The previous prime is 79657289. The next prime is 79657373. The reversal of 79657339 is 93375697.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 79657339 - 2¹⁹ = 79133051 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79657292 and 79657301.

It is not an unprimeable number, because it can be changed into a prime (79657939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 847372 + ... + 847465.

It is an arithmetic number, because the mean of its divisors is an integer number (20338056).

Almost surely, 2^79657339 is an apocalyptic number.

79657339 is a deficient number, since it is larger than the sum of its proper divisors (1694885).

79657339 is a wasteful number, since it uses less digits than its factorization.

79657339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694884.

The product of its digits is 1071630, while the sum is 49.

The square root of 79657339 is about 8925.0960218924. The cubic root of 79657339 is about 430.2708569339.

The spelling of 79657339 in words is "seventy-nine million, six hundred fifty-seven thousand, three hundred thirty-nine".