91084812 has 96 divisors (see below), whose sum is σ = 263424000. Its totient is φ = 23853312.

The previous prime is 91084783. The next prime is 91084813. The reversal of 91084812 is 21848019.

It is not an unprimeable number, because it can be changed into a prime (91084813) 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 31 ways as a sum of consecutive naturals, for example, 260814 + ... + 261162.

It is an arithmetic number, because the mean of its divisors is an integer number (2744000).

Almost surely, 2^91084812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91084812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131712000).

91084812 is an abundant number, since it is smaller than the sum of its proper divisors (172339188).

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

91084812 is a wasteful number, since it uses less digits than its factorization.

91084812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615 (or 613 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 91084812 is about 9543.8363355623. The cubic root of 91084812 is about 449.9338371862.

The spelling of 91084812 in words is "ninety-one million, eighty-four thousand, eight hundred twelve".