991882 has 8 divisors (see below), whose sum is σ = 1575396. Its totient is φ = 466752.

The previous prime is 991873. The next prime is 991883. The reversal of 991882 is 288199.

It can be written as a sum of positive squares in 2 ways, for example, as 982081 + 9801 = 991^2 + 99^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (991883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14553 + ... + 14620.

2⁹⁹¹⁸⁸² is an apocalyptic number.

991882 is a deficient number, since it is larger than the sum of its proper divisors (583514).

991882 is a wasteful number, since it uses less digits than its factorization.

991882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29192.

The product of its digits is 10368, while the sum is 37.

The square root of 991882 is about 995.9327286519. The cubic root of 991882 is about 99.7286644360.

It can be divided in two parts, 9918 and 82, that added together give a 4-th power (10000 = 10⁴).

The spelling of 991882 in words is "nine hundred ninety-one thousand, eight hundred eighty-two".