91550912 has 56 divisors (see below), whose sum is σ = 190103760. Its totient is φ = 43688960.

The previous prime is 91550891. The next prime is 91550917. The reversal of 91550912 is 21905519.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91550917) 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, 198362 + ... + 198822.

It is an arithmetic number, because the mean of its divisors is an integer number (3394710).

Almost surely, 2^91550912 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 91550912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95051880).

91550912 is an abundant number, since it is smaller than the sum of its proper divisors (98552848).

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

91550912 is a wasteful number, since it uses less digits than its factorization.

91550912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609 (or 599 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 32.

The square root of 91550912 is about 9568.2240776437. The cubic root of 91550912 is about 450.7000002576.

The spelling of 91550912 in words is "ninety-one million, five hundred fifty thousand, nine hundred twelve".