91111092 has 48 divisors (see below), whose sum is σ = 227852352. Its totient is φ = 28234240.

The previous prime is 91111091. The next prime is 91111093. The reversal of 91111092 is 29011119.

It is an interprime number because it is at equal distance from previous prime (91111091) and next prime (91111093).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91111091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14242 + ... + 19622.

It is an arithmetic number, because the mean of its divisors is an integer number (4746924).

Almost surely, 2^91111092 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 91111092, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113926176).

91111092 is an abundant number, since it is smaller than the sum of its proper divisors (136741260).

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

91111092 is a wasteful number, since it uses less digits than its factorization.

91111092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5488 (or 5486 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 24.

The square root of 91111092 is about 9545.2130411008. The cubic root of 91111092 is about 449.9771050080.

The spelling of 91111092 in words is "ninety-one million, one hundred eleven thousand, ninety-two".