91717 has 4 divisors (see below), whose sum is σ = 93996. Its totient is φ = 89440.

The previous prime is 91711. The next prime is 91733. The reversal of 91717 is 71719.

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

It can be written as a sum of positive squares in 2 ways, for example, as 34596 + 57121 = 186^2 + 239^2 .

It is a cyclic number.

It is not a de Polignac number, because 91717 - 2¹¹ = 89669 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91691 and 91700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91711) 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, 1078 + ... + 1159.

It is an arithmetic number, because the mean of its divisors is an integer number (23499).

2⁹¹⁷¹⁷ is an apocalyptic number.

It is an amenable number.

91717 is a deficient number, since it is larger than the sum of its proper divisors (2279).

91717 is a wasteful number, since it uses less digits than its factorization.

91717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2278.

The product of its digits is 441, while the sum is 25.

The square root of 91717 is about 302.8481467667. The cubic root of 91717 is about 45.0972382909.

It can be divided in two parts, 91 and 717, that added together give a palindrome (808).

The spelling of 91717 in words is "ninety-one thousand, seven hundred seventeen".