91081092 has 24 divisors (see below), whose sum is σ = 213286752. Its totient is φ = 30251200.

The previous prime is 91081091. The next prime is 91081097. The reversal of 91081092 is 29018019.

It is not an unprimeable number, because it can be changed into a prime (91081091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10134 + ... + 16877.

It is an arithmetic number, because the mean of its divisors is an integer number (8886948).

Almost surely, 2^91081092 is an apocalyptic number.

It is an amenable number.

91081092 is an abundant number, since it is smaller than the sum of its proper divisors (122205660).

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

91081092 is a wasteful number, since it uses less digits than its factorization.

91081092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27299 (or 27297 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 91081092 is about 9543.6414433905. The cubic root of 91081092 is about 449.9277118450.

The spelling of 91081092 in words is "ninety-one million, eighty-one thousand, ninety-two".