91745 has 8 divisors (see below), whose sum is σ = 112320. Its totient is φ = 71920.

The previous prime is 91733. The next prime is 91753. The reversal of 91745 is 54719.

91745 is nontrivially palindromic in base 16.

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

It is not a de Polignac number, because 91745 - 2¹² = 87649 is a prime.

It is a zygodrome in base 3.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140 + ... + 450.

It is an arithmetic number, because the mean of its divisors is an integer number (14040).

2⁹¹⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

91745 is a deficient number, since it is larger than the sum of its proper divisors (20575).

91745 is a wasteful number, since it uses less digits than its factorization.

91745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375.

The product of its digits is 1260, while the sum is 26.

The square root of 91745 is about 302.8943710273. The cubic root of 91745 is about 45.1018270229.

Subtracting from 91745 its sum of digits (26), we obtain a palindrome (91719).

The spelling of 91745 in words is "ninety-one thousand, seven hundred forty-five".