91983663 has 12 divisors (see below), whose sum is σ = 133005600. Its totient is φ = 61257696.

The previous prime is 91983649. The next prime is 91983677. The reversal of 91983663 is 36638919.

It is an interprime number because it is at equal distance from previous prime (91983649) and next prime (91983677).

It is not a de Polignac number, because 91983663 - 2²⁴ = 75206447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91983163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4570 + ... + 14312.

It is an arithmetic number, because the mean of its divisors is an integer number (11083800).

Almost surely, 2^91983663 is an apocalyptic number.

91983663 is a deficient number, since it is larger than the sum of its proper divisors (41021937).

91983663 is a wasteful number, since it uses less digits than its factorization.

91983663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10798 (or 10795 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 91983663 is about 9590.8113838194. The cubic root of 91983663 is about 451.4090205679.

The spelling of 91983663 in words is "ninety-one million, nine hundred eighty-three thousand, six hundred sixty-three".