91161169 has 8 divisors (see below), whose sum is σ = 100362240. Its totient is φ = 82112400.

The previous prime is 91161151. The next prime is 91161209. The reversal of 91161169 is 96116119.

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

It is a cyclic number.

It is not a de Polignac number, because 91161169 - 2⁵ = 91161137 is a prime.

It is a super-2 number, since 2×91161169² = 16620717466893122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91161149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36817 + ... + 39214.

It is an arithmetic number, because the mean of its divisors is an integer number (12545280).

Almost surely, 2^91161169 is an apocalyptic number.

It is an amenable number.

91161169 is a deficient number, since it is larger than the sum of its proper divisors (9201071).

91161169 is a wasteful number, since it uses less digits than its factorization.

91161169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76151.

The product of its digits is 2916, while the sum is 34.

The square root of 91161169 is about 9547.8358280817. The cubic root of 91161169 is about 450.0595295732.

The spelling of 91161169 in words is "ninety-one million, one hundred sixty-one thousand, one hundred sixty-nine".