79717 has 4 divisors (see below), whose sum is σ = 86976. Its totient is φ = 72460.

The previous prime is 79699. The next prime is 79757. The reversal of 79717 is 71797.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 79717 - 2⁷ = 79589 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79757) 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, 3613 + ... + 3634.

It is an arithmetic number, because the mean of its divisors is an integer number (21744).

2⁷⁹⁷¹⁷ is an apocalyptic number.

It is an amenable number.

79717 is a deficient number, since it is larger than the sum of its proper divisors (7259).

79717 is a wasteful number, since it uses less digits than its factorization.

79717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7258.

The product of its digits is 3087, while the sum is 31.

The square root of 79717 is about 282.3419912092. The cubic root of 79717 is about 43.0378250192.

The spelling of 79717 in words is "seventy-nine thousand, seven hundred seventeen".