91751 has 8 divisors (see below), whose sum is σ = 105600. Its totient is φ = 78840.

The previous prime is 91733. The next prime is 91753. The reversal of 91751 is 15719.

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 91751 - 2¹⁴ = 75367 is a prime.

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 91751.

It is not an unprimeable number, because it can be changed into a prime (91753) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11 + ... + 428.

It is an arithmetic number, because the mean of its divisors is an integer number (13200).

2⁹¹⁷⁵¹ is an apocalyptic number.

91751 is a deficient number, since it is larger than the sum of its proper divisors (13849).

91751 is a wasteful number, since it uses less digits than its factorization.

91751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469.

The product of its digits is 315, while the sum is 23.

The square root of 91751 is about 302.9042753082. The cubic root of 91751 is about 45.1028102011.

The spelling of 91751 in words is "ninety-one thousand, seven hundred fifty-one".