91170169 has 4 divisors (see below), whose sum is σ = 91494900. Its totient is φ = 90845440.

The previous prime is 91170161. The next prime is 91170179. The reversal of 91170169 is 96107119.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96107119 = 2069 ⋅46451.

It can be written as a sum of positive squares in 2 ways, for example, as 31494544 + 59675625 = 5612^2 + 7725^2 .

It is a cyclic number.

It is not a de Polignac number, because 91170169 - 2³ = 91170161 is a prime.

It is a super-2 number, since 2×91170169² = 16623999430977122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91170161) 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, 161944 + ... + 162505.

It is an arithmetic number, because the mean of its divisors is an integer number (22873725).

Almost surely, 2^91170169 is an apocalyptic number.

It is an amenable number.

91170169 is a deficient number, since it is larger than the sum of its proper divisors (324731).

91170169 is a wasteful number, since it uses less digits than its factorization.

91170169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324730.

The product of its (nonzero) digits is 3402, while the sum is 34.

The square root of 91170169 is about 9548.3071274441. The cubic root of 91170169 is about 450.0743399817.

The spelling of 91170169 in words is "ninety-one million, one hundred seventy thousand, one hundred sixty-nine".