91171 has 8 divisors (see below), whose sum is σ = 100224. Its totient is φ = 82560.

The previous prime is 91163. The next prime is 91183. The reversal of 91171 is 17119.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 91171 - 2³ = 91163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 441 + ... + 613.

It is an arithmetic number, because the mean of its divisors is an integer number (12528).

2⁹¹¹⁷¹ is an apocalyptic number.

91171 is a deficient number, since it is larger than the sum of its proper divisors (9053).

91171 is a wasteful number, since it uses less digits than its factorization.

91171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221.

The product of its digits is 63, while the sum is 19.

The square root of 91171 is about 301.9453592954. The cubic root of 91171 is about 45.0075707427.

It can be divided in two parts, 91 and 171, that added together give a palindrome (262).

The spelling of 91171 in words is "ninety-one thousand, one hundred seventy-one".