991832 has 8 divisors (see below), whose sum is σ = 1859700. Its totient is φ = 495912.

The previous prime is 991817. The next prime is 991867. The reversal of 991832 is 238199.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

991832 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61982 + ... + 61997.

2⁹⁹¹⁸³² is an apocalyptic number.

It is an amenable number.

991832 is a deficient number, since it is larger than the sum of its proper divisors (867868).

991832 is a wasteful number, since it uses less digits than its factorization.

991832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123985 (or 123981 counting only the distinct ones).

The product of its digits is 3888, while the sum is 32.

The square root of 991832 is about 995.9076262385. The cubic root of 991832 is about 99.7269886597.

The spelling of 991832 in words is "nine hundred ninety-one thousand, eight hundred thirty-two".