91775 has 6 divisors (see below), whose sum is σ = 113832. Its totient is φ = 73400.

The previous prime is 91771. The next prime is 91781. The reversal of 91775 is 57719.

It is not a de Polignac number, because 91775 - 2² = 91771 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

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 91775.

It is not an unprimeable number, because it can be changed into a prime (91771) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1811 + ... + 1860.

It is an arithmetic number, because the mean of its divisors is an integer number (18972).

2⁹¹⁷⁷⁵ is an apocalyptic number.

91775 is a deficient number, since it is larger than the sum of its proper divisors (22057).

91775 is a wasteful number, since it uses less digits than its factorization.

91775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3681 (or 3676 counting only the distinct ones).

The product of its digits is 2205, while the sum is 29.

The square root of 91775 is about 302.9438891940. The cubic root of 91775 is about 45.1067424855.

The spelling of 91775 in words is "ninety-one thousand, seven hundred seventy-five".