79686 has 24 divisors (see below), whose sum is σ = 182520. Its totient is φ = 25056.

The previous prime is 79669. The next prime is 79687. The reversal of 79686 is 68697.

It is a self number, because there is not a number n which added to its sum of digits gives 79686.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 79686.

It is not an unprimeable number, because it can be changed into a prime (79687) by changing a digit.

79686 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 226 + ... + 458.

It is an arithmetic number, because the mean of its divisors is an integer number (7605).

2⁷⁹⁶⁸⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91260).

79686 is an abundant number, since it is smaller than the sum of its proper divisors (102834).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79686 is a wasteful number, since it uses less digits than its factorization.

79686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260 (or 257 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 79686 is about 282.2870879087. The cubic root of 79686 is about 43.0322455085.

The spelling of 79686 in words is "seventy-nine thousand, six hundred eighty-six".