990827 has 4 divisors (see below), whose sum is σ = 997296. Its totient is φ = 984360.

The previous prime is 990809. The next prime is 990841. The reversal of 990827 is 728099.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 728099 = 19 ⋅38321.

It is a cyclic number.

It is not a de Polignac number, because 990827 - 2¹⁰ = 989803 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 990827.

It is not an unprimeable number, because it can be changed into a prime (990887) 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, 2999 + ... + 3312.

It is an arithmetic number, because the mean of its divisors is an integer number (249324).

2⁹⁹⁰⁸²⁷ is an apocalyptic number.

990827 is a deficient number, since it is larger than the sum of its proper divisors (6469).

990827 is a wasteful number, since it uses less digits than its factorization.

990827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6468.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 990827 is about 995.4029334898. The cubic root of 990827 is about 99.6932936069.

The spelling of 990827 in words is "nine hundred ninety thousand, eight hundred twenty-seven".