79784947 has 4 divisors (see below), whose sum is σ = 87038136. Its totient is φ = 72531760.

The previous prime is 79784899. The next prime is 79784959. The reversal of 79784947 is 74948797.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79784947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79784977) 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, 3626578 + ... + 3626599.

It is an arithmetic number, because the mean of its divisors is an integer number (21759534).

Almost surely, 2^79784947 is an apocalyptic number.

79784947 is a deficient number, since it is larger than the sum of its proper divisors (7253189).

79784947 is a wasteful number, since it uses less digits than its factorization.

79784947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7253188.

The product of its digits is 3556224, while the sum is 55.

The square root of 79784947 is about 8932.2419917958. The cubic root of 79784947 is about 430.5004934879.

The spelling of 79784947 in words is "seventy-nine million, seven hundred eighty-four thousand, nine hundred forty-seven".