79686223 has 2 divisors, whose sum is σ = 79686224. Its totient is φ = 79686222.

The previous prime is 79686199. The next prime is 79686227. The reversal of 79686223 is 32268697.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79686223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79686223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79686227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39843111 + 39843112.

It is an arithmetic number, because the mean of its divisors is an integer number (39843112).

Almost surely, 2^79686223 is an apocalyptic number.

79686223 is a deficient number, since it is larger than the sum of its proper divisors (1).

79686223 is an equidigital number, since it uses as much as digits as its factorization.

79686223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 43.

The square root of 79686223 is about 8926.7140090853. The cubic root of 79686223 is about 430.3228565017.

The spelling of 79686223 in words is "seventy-nine million, six hundred eighty-six thousand, two hundred twenty-three".