91992894 has 48 divisors (see below), whose sum is σ = 215495568. Its totient is φ = 26103168.

The previous prime is 91992883. The next prime is 91992907. The reversal of 91992894 is 49829919.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45162 + ... + 47154.

It is an arithmetic number, because the mean of its divisors is an integer number (4489491).

Almost surely, 2^91992894 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91992894, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107747784).

91992894 is an abundant number, since it is smaller than the sum of its proper divisors (123502674).

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

91992894 is a wasteful number, since it uses less digits than its factorization.

91992894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2169 (or 2162 counting only the distinct ones).

The product of its digits is 419904, while the sum is 51.

The square root of 91992894 is about 9591.2926136157. The cubic root of 91992894 is about 451.4241204134.

The spelling of 91992894 in words is "ninety-one million, nine hundred ninety-two thousand, eight hundred ninety-four".