79909847 has 8 divisors (see below), whose sum is σ = 83261952. Its totient is φ = 76606200.

The previous prime is 79909829. The next prime is 79909859. The reversal of 79909847 is 74890997.

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

It is a cyclic number.

It is not a de Polignac number, because 79909847 - 2⁶ = 79909783 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 (79909897) 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, 8729 + ... + 15362.

It is an arithmetic number, because the mean of its divisors is an integer number (10407744).

Almost surely, 2^79909847 is an apocalyptic number.

79909847 is a deficient number, since it is larger than the sum of its proper divisors (3352105).

79909847 is a wasteful number, since it uses less digits than its factorization.

79909847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24229.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The square root of 79909847 is about 8939.2307834623. The cubic root of 79909847 is about 430.7250198764.

The spelling of 79909847 in words is "seventy-nine million, nine hundred nine thousand, eight hundred forty-seven".