990433 has 4 divisors (see below), whose sum is σ = 1007280. Its totient is φ = 973588.

The previous prime is 990397. The next prime is 990463. The reversal of 990433 is 334099.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 990433 - 2⁹ = 989921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (990463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8335 + ... + 8452.

It is an arithmetic number, because the mean of its divisors is an integer number (251820).

2⁹⁹⁰⁴³³ is an apocalyptic number.

It is an amenable number.

990433 is a deficient number, since it is larger than the sum of its proper divisors (16847).

990433 is a wasteful number, since it uses less digits than its factorization.

990433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16846.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 990433 is about 995.2050040067. The cubic root of 990433 is about 99.6800775880.

The spelling of 990433 in words is "nine hundred ninety thousand, four hundred thirty-three".