990333 has 16 divisors (see below), whose sum is σ = 1503040. Its totient is φ = 644112.

The previous prime is 990331. The next prime is 990349. The reversal of 990333 is 333099.

It is not a de Polignac number, because 990333 - 2¹ = 990331 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 990297 and 990306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990331) 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 15 ways as a sum of consecutive naturals, for example, 735 + ... + 1587.

It is an arithmetic number, because the mean of its divisors is an integer number (93940).

2⁹⁹⁰³³³ is an apocalyptic number.

It is an amenable number.

990333 is a deficient number, since it is larger than the sum of its proper divisors (512707).

990333 is a wasteful number, since it uses less digits than its factorization.

990333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905 (or 899 counting only the distinct ones).

The product of its (nonzero) digits is 2187, while the sum is 27.

The square root of 990333 is about 995.1547618336. The cubic root of 990333 is about 99.6767227108.

The spelling of 990333 in words is "nine hundred ninety thousand, three hundred thirty-three".