91680953 has 8 divisors (see below), whose sum is σ = 112838208. Its totient is φ = 72538704.

The previous prime is 91680943. The next prime is 91680959. The reversal of 91680953 is 35908619.

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

It is not a de Polignac number, because 91680953 - 2⁶ = 91680889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91680953.

It is not an unprimeable number, because it can be changed into a prime (91680959) 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, 503651 + ... + 503832.

It is an arithmetic number, because the mean of its divisors is an integer number (14104776).

Almost surely, 2^91680953 is an apocalyptic number.

It is an amenable number.

91680953 is a deficient number, since it is larger than the sum of its proper divisors (21157255).

91680953 is a wasteful number, since it uses less digits than its factorization.

91680953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007503.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 91680953 is about 9575.0171279220. The cubic root of 91680953 is about 450.9132941479.

The spelling of 91680953 in words is "ninety-one million, six hundred eighty thousand, nine hundred fifty-three".