91915 has 8 divisors (see below), whose sum is σ = 114048. Its totient is φ = 71040.

The previous prime is 91909. The next prime is 91921. The reversal of 91915 is 51919.

It is an interprime number because it is at equal distance from previous prime (91909) and next prime (91921).

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

It is not a de Polignac number, because 91915 - 2¹¹ = 89867 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91915.

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, 142 + ... + 451.

It is an arithmetic number, because the mean of its divisors is an integer number (14256).

2⁹¹⁹¹⁵ is an apocalyptic number.

91915 is a deficient number, since it is larger than the sum of its proper divisors (22133).

91915 is a wasteful number, since it uses less digits than its factorization.

91915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629.

The product of its digits is 405, while the sum is 25.

The square root of 91915 is about 303.1748670322. The cubic root of 91915 is about 45.1296671585.

The spelling of 91915 in words is "ninety-one thousand, nine hundred fifteen".