79687 has 2 divisors, whose sum is σ = 79688. Its totient is φ = 79686.

The previous prime is 79669. The next prime is 79691. The reversal of 79687 is 78697.

It is a strong prime.

It is an emirp because it is prime and its reverse (78697) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79687 - 2⁷ = 79559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39843 + 39844.

It is an arithmetic number, because the mean of its divisors is an integer number (39844).

2⁷⁹⁶⁸⁷ is an apocalyptic number.

79687 is a deficient number, since it is larger than the sum of its proper divisors (1).

79687 is an equidigital number, since it uses as much as digits as its factorization.

79687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 37.

The square root of 79687 is about 282.2888591496. The cubic root of 79687 is about 43.0324255153.

Subtracting from 79687 its reverse (78697), we obtain a triangular number (990 = T₄₄).

The spelling of 79687 in words is "seventy-nine thousand, six hundred eighty-seven".