91768691 has 8 divisors (see below), whose sum is σ = 106206720. Its totient is φ = 77662728.

The previous prime is 91768687. The next prime is 91768697. The reversal of 91768691 is 19686719.

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 91768691 - 2² = 91768687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91768697) 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, 82421 + ... + 83526.

It is an arithmetic number, because the mean of its divisors is an integer number (13275840).

Almost surely, 2^91768691 is an apocalyptic number.

91768691 is a deficient number, since it is larger than the sum of its proper divisors (14438029).

91768691 is a wasteful number, since it uses less digits than its factorization.

91768691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166033.

The product of its digits is 163296, while the sum is 47.

The square root of 91768691 is about 9579.5976429076. The cubic root of 91768691 is about 451.0570885267.

The spelling of 91768691 in words is "ninety-one million, seven hundred sixty-eight thousand, six hundred ninety-one".