91768059 has 20 divisors (see below), whose sum is σ = 138830560. Its totient is φ = 60400080.

The previous prime is 91768031. The next prime is 91768067. The reversal of 91768059 is 95086719.

It is not a de Polignac number, because 91768059 - 2⁷ = 91767931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91768009) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 772 + ... + 13569.

It is an arithmetic number, because the mean of its divisors is an integer number (6941528).

Almost surely, 2^91768059 is an apocalyptic number.

91768059 is a deficient number, since it is larger than the sum of its proper divisors (47062501).

91768059 is a wasteful number, since it uses less digits than its factorization.

91768059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14432 (or 14423 counting only the distinct ones).

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

The square root of 91768059 is about 9579.5646560791. The cubic root of 91768059 is about 451.0560530656.

The spelling of 91768059 in words is "ninety-one million, seven hundred sixty-eight thousand, fifty-nine".