990837 has 12 divisors (see below), whose sum is σ = 1448460. Its totient is φ = 652608.

The previous prime is 990809. The next prime is 990841. The reversal of 990837 is 738099.

It can be written as a sum of positive squares in 2 ways, for example, as 463761 + 527076 = 681^2 + 726^2 .

It is not a de Polignac number, because 990837 - 2¹¹ = 988789 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

990837 is a lucky number.

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 (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 11 ways as a sum of consecutive naturals, for example, 183 + ... + 1419.

It is an arithmetic number, because the mean of its divisors is an integer number (120705).

2⁹⁹⁰⁸³⁷ is an apocalyptic number.

It is an amenable number.

990837 is a deficient number, since it is larger than the sum of its proper divisors (457623).

990837 is a wasteful number, since it uses less digits than its factorization.

990837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332 (or 1329 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 990837 is about 995.4079565686. The cubic root of 990837 is about 99.6936289933.

The spelling of 990837 in words is "nine hundred ninety thousand, eight hundred thirty-seven".