91685097 has 24 divisors (see below), whose sum is σ = 160258176. Its totient is φ = 49309056.

The previous prime is 91685057. The next prime is 91685123. The reversal of 91685097 is 79058619.

It is not a de Polignac number, because 91685097 - 2¹¹ = 91683049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91685047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41733 + ... + 43874.

It is an arithmetic number, because the mean of its divisors is an integer number (6677424).

Almost surely, 2^91685097 is an apocalyptic number.

It is an amenable number.

91685097 is a deficient number, since it is larger than the sum of its proper divisors (68573079).

91685097 is a wasteful number, since it uses less digits than its factorization.

91685097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85637 (or 85634 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 91685097 is about 9575.2335219565. The cubic root of 91685097 is about 450.9200878401.

The spelling of 91685097 in words is "ninety-one million, six hundred eighty-five thousand, ninety-seven".