79675639 has 4 divisors (see below), whose sum is σ = 79694856. Its totient is φ = 79656424.

The previous prime is 79675637. The next prime is 79675643. The reversal of 79675639 is 93657697.

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 79675639 - 2¹ = 79675637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79675633) 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, 529 + ... + 12634.

It is an arithmetic number, because the mean of its divisors is an integer number (19923714).

Almost surely, 2^79675639 is an apocalyptic number.

79675639 is a deficient number, since it is larger than the sum of its proper divisors (19217).

79675639 is a wasteful number, since it uses less digits than its factorization.

79675639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19216.

The product of its digits is 2143260, while the sum is 52.

The square root of 79675639 is about 8926.1211620726. The cubic root of 79675639 is about 430.3038036943.

The spelling of 79675639 in words is "seventy-nine million, six hundred seventy-five thousand, six hundred thirty-nine".