91768685 has 8 divisors (see below), whose sum is σ = 110213376. Its totient is φ = 73354320.

The previous prime is 91768679. The next prime is 91768687. The reversal of 91768685 is 58686719.

It is a happy number.

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

It is not a de Polignac number, because 91768685 - 2²⁶ = 24659821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91768687) 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, 281 + ... + 13550.

It is an arithmetic number, because the mean of its divisors is an integer number (13776672).

Almost surely, 2^91768685 is an apocalyptic number.

It is an amenable number.

91768685 is a deficient number, since it is larger than the sum of its proper divisors (18444691).

91768685 is a wasteful number, since it uses less digits than its factorization.

91768685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15163.

The product of its digits is 725760, while the sum is 50.

The square root of 91768685 is about 9579.5973297420. The cubic root of 91768685 is about 451.0570786964.

The spelling of 91768685 in words is "ninety-one million, seven hundred sixty-eight thousand, six hundred eighty-five".