91715 has 16 divisors (see below), whose sum is σ = 127008. Its totient is φ = 62976.

The previous prime is 91711. The next prime is 91733. The reversal of 91715 is 51719.

91715 = T₁₀₃ + T₁₀₄ + ... + T₁₁₇.

It is a cyclic number.

It is not a de Polignac number, because 91715 - 2² = 91711 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1064 + ... + 1146.

It is an arithmetic number, because the mean of its divisors is an integer number (7938).

2⁹¹⁷¹⁵ is an apocalyptic number.

91715 is a deficient number, since it is larger than the sum of its proper divisors (35293).

91715 is a wasteful number, since it uses less digits than its factorization.

91715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118.

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

The square root of 91715 is about 302.8448447638. The cubic root of 91715 is about 45.0969104886.

The spelling of 91715 in words is "ninety-one thousand, seven hundred fifteen".