91011492 has 192 divisors, whose sum is σ = 284497920. Its totient is φ = 24796800.

The previous prime is 91011491. The next prime is 91011499. The reversal of 91011492 is 29411019.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91011491) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1096483 + ... + 1096565.

It is an arithmetic number, because the mean of its divisors is an integer number (1481760).

Almost surely, 2^91011492 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 91011492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142248960).

91011492 is an abundant number, since it is smaller than the sum of its proper divisors (193486428).

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

91011492 is a wasteful number, since it uses less digits than its factorization.

91011492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 91011492 is about 9539.9943396210. The cubic root of 91011492 is about 449.8130779222.

The spelling of 91011492 in words is "ninety-one million, eleven thousand, four hundred ninety-two".