991092 has 12 divisors (see below), whose sum is σ = 2312576. Its totient is φ = 330360.

The previous prime is 991091. The next prime is 991127. The reversal of 991092 is 290199.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991091) 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 3 ways as a sum of consecutive naturals, for example, 41284 + ... + 41307.

2⁹⁹¹⁰⁹² is an apocalyptic number.

It is an amenable number.

991092 is an abundant number, since it is smaller than the sum of its proper divisors (1321484).

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

991092 is a wasteful number, since it uses less digits than its factorization.

991092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82598 (or 82596 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 30.

The square root of 991092 is about 995.5360365150. The cubic root of 991092 is about 99.7021805831.

The spelling of 991092 in words is "nine hundred ninety-one thousand, ninety-two".