991132 has 12 divisors (see below), whose sum is σ = 1790656. Its totient is φ = 479520.

The previous prime is 991129. The next prime is 991147. The reversal of 991132 is 231199.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 991097 and 991106.

It is a congruent number.

It is an unprimeable number.

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, 3873 + ... + 4120.

2⁹⁹¹¹³² is an apocalyptic number.

It is an amenable number.

991132 is a deficient number, since it is larger than the sum of its proper divisors (799524).

991132 is a wasteful number, since it uses less digits than its factorization.

991132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8028 (or 8026 counting only the distinct ones).

The product of its digits is 486, while the sum is 25.

The square root of 991132 is about 995.5561259919. The cubic root of 991132 is about 99.7035218759.

The spelling of 991132 in words is "nine hundred ninety-one thousand, one hundred thirty-two".