79890747 has 8 divisors (see below), whose sum is σ = 107360256. Its totient is φ = 52840872.

The previous prime is 79890709. The next prime is 79890749. The reversal of 79890747 is 74709897.

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

It is not a de Polignac number, because 79890747 - 2⁶ = 79890683 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79890747.

It is not an unprimeable number, because it can be changed into a prime (79890749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104463 + ... + 105224.

It is an arithmetic number, because the mean of its divisors is an integer number (13420032).

Almost surely, 2^79890747 is an apocalyptic number.

79890747 is a deficient number, since it is larger than the sum of its proper divisors (27469509).

79890747 is a wasteful number, since it uses less digits than its factorization.

79890747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209817.

The product of its (nonzero) digits is 889056, while the sum is 51.

The square root of 79890747 is about 8938.1623950340. The cubic root of 79890747 is about 430.6906999366.

The spelling of 79890747 in words is "seventy-nine million, eight hundred ninety thousand, seven hundred forty-seven".