91120000 has 160 divisors (see below), whose sum is σ = 243765720. Its totient is φ = 33792000.

The previous prime is 91119979. The next prime is 91120027. The reversal of 91120000 is 2119.

It is a tau number, because it is divible by the number of its divisors (160).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1359967 + ... + 1360033.

Almost surely, 2^91120000 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 91120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121882860).

91120000 is an abundant number, since it is smaller than the sum of its proper divisors (152645720).

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

91120000 is an equidigital number, since it uses as much as digits as its factorization.

91120000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 91120000 is about 9545.6796510254. The cubic root of 91120000 is about 449.9917693968.

Adding to 91120000 its reverse (2119), we get a palindrome (91122119).

The spelling of 91120000 in words is "ninety-one million, one hundred twenty thousand".