91996163 has 16 divisors (see below), whose sum is σ = 113218560. Its totient is φ = 72951936.

The previous prime is 91996147. The next prime is 91996187. The reversal of 91996163 is 36169919.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 91996163 - 2⁴ = 91996147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91996123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 470 + ... + 13572.

It is an arithmetic number, because the mean of its divisors is an integer number (7076160).

Almost surely, 2^91996163 is an apocalyptic number.

91996163 is a deficient number, since it is larger than the sum of its proper divisors (21222397).

91996163 is a wasteful number, since it uses less digits than its factorization.

91996163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13186.

The product of its digits is 78732, while the sum is 44.

The square root of 91996163 is about 9591.4630270882. The cubic root of 91996163 is about 451.4294675219.

The spelling of 91996163 in words is "ninety-one million, nine hundred ninety-six thousand, one hundred sixty-three".