91868922 has 12 divisors (see below), whose sum is σ = 199049370. Its totient is φ = 30622968.

The previous prime is 91868921. The next prime is 91868927. The reversal of 91868922 is 22986819.

It can be written as a sum of positive squares in only one way, i.e., 65950641 + 25918281 = 8121^2 + 5091^2 .

It is not an unprimeable number, because it can be changed into a prime (91868921) 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, 2551897 + ... + 2551932.

Almost surely, 2^91868922 is an apocalyptic number.

91868922 is an abundant number, since it is smaller than the sum of its proper divisors (107180448).

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

91868922 is a wasteful number, since it uses less digits than its factorization.

91868922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5103837 (or 5103834 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 91868922 is about 9584.8276979818. The cubic root of 91868922 is about 451.2212456515.

The spelling of 91868922 in words is "ninety-one million, eight hundred sixty-eight thousand, nine hundred twenty-two".