91722 has 8 divisors (see below), whose sum is σ = 183456. Its totient is φ = 30572.

The previous prime is 91711. The next prime is 91733. The reversal of 91722 is 22719.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (91711) and next prime (91733).

It is a sphenic number, since it is the product of 3 distinct primes.

91722 is an admirable number.

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 91722.

It is an unprimeable number.

91722 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 3 ways as a sum of consecutive naturals, for example, 7638 + ... + 7649.

It is an arithmetic number, because the mean of its divisors is an integer number (22932).

2⁹¹⁷²² is an apocalyptic number.

91722 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91728).

91722 is a wasteful number, since it uses less digits than its factorization.

91722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15292.

The product of its digits is 252, while the sum is 21.

The square root of 91722 is about 302.8564016163. The cubic root of 91722 is about 45.0980577758.

It can be divided in two parts, 917 and 22, that added together give a palindrome (939).

The spelling of 91722 in words is "ninety-one thousand, seven hundred twenty-two".