91914171 has 4 divisors (see below), whose sum is σ = 122552232. Its totient is φ = 61276112.

The previous prime is 91914157. The next prime is 91914203. The reversal of 91914171 is 17141919.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91914171 - 2¹⁰ = 91913147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91914131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15319026 + ... + 15319031.

It is an arithmetic number, because the mean of its divisors is an integer number (30638058).

Almost surely, 2^91914171 is an apocalyptic number.

91914171 is a deficient number, since it is larger than the sum of its proper divisors (30638061).

91914171 is a wasteful number, since it uses less digits than its factorization.

91914171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30638060.

The product of its digits is 2268, while the sum is 33.

The square root of 91914171 is about 9587.1878567179. The cubic root of 91914171 is about 451.2953148018.

The spelling of 91914171 in words is "ninety-one million, nine hundred fourteen thousand, one hundred seventy-one".