91680696 has 24 divisors (see below), whose sum is σ = 248302080. Its totient is φ = 30560208.

The previous prime is 91680683. The next prime is 91680697. The reversal of 91680696 is 69608619.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91680697) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 636600 + ... + 636743.

It is an arithmetic number, because the mean of its divisors is an integer number (10345920).

Almost surely, 2^91680696 is an apocalyptic number.

It is an amenable number.

91680696 is an abundant number, since it is smaller than the sum of its proper divisors (156621384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91680696 is a wasteful number, since it uses less digits than its factorization.

91680696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273355 (or 1273348 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 91680696 is about 9575.0037075711. The cubic root of 91680696 is about 450.9128728142.

The spelling of 91680696 in words is "ninety-one million, six hundred eighty thousand, six hundred ninety-six".