91764169 has 4 divisors (see below), whose sum is σ = 104873344. Its totient is φ = 78654996.

The previous prime is 91764161. The next prime is 91764187. The reversal of 91764169 is 96146719.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96146719 = 4127 ⋅23297.

It is not a de Polignac number, because 91764169 - 2³ = 91764161 is a prime.

It is a super-2 number, since 2×91764169² = 16841325424521122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91764161) 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, 6554577 + ... + 6554590.

It is an arithmetic number, because the mean of its divisors is an integer number (26218336).

Almost surely, 2^91764169 is an apocalyptic number.

It is an amenable number.

91764169 is a deficient number, since it is larger than the sum of its proper divisors (13109175).

91764169 is a wasteful number, since it uses less digits than its factorization.

91764169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13109174.

The product of its digits is 81648, while the sum is 43.

The square root of 91764169 is about 9579.3616175610. The cubic root of 91764169 is about 451.0496796322.

The spelling of 91764169 in words is "ninety-one million, seven hundred sixty-four thousand, one hundred sixty-nine".