79790847 has 4 divisors (see below), whose sum is σ = 106387800. Its totient is φ = 53193896.

The previous prime is 79790839. The next prime is 79790857. The reversal of 79790847 is 74809797.

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 79790847 - 2³ = 79790839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79790847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79790827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13298472 + ... + 13298477.

It is an arithmetic number, because the mean of its divisors is an integer number (26596950).

Almost surely, 2^79790847 is an apocalyptic number.

79790847 is a deficient number, since it is larger than the sum of its proper divisors (26596953).

79790847 is a wasteful number, since it uses less digits than its factorization.

79790847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26596952.

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

The square root of 79790847 is about 8932.5722499177. The cubic root of 79790847 is about 430.5111048893.

The spelling of 79790847 in words is "seventy-nine million, seven hundred ninety thousand, eight hundred forty-seven".