990203 has 4 divisors (see below), whose sum is σ = 992328. Its totient is φ = 988080.

The previous prime is 990181. The next prime is 990211. The reversal of 990203 is 302099.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-990203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (990293) 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, 26 + ... + 1407.

It is an arithmetic number, because the mean of its divisors is an integer number (248082).

2⁹⁹⁰²⁰³ is an apocalyptic number.

990203 is a deficient number, since it is larger than the sum of its proper divisors (2125).

990203 is a wasteful number, since it uses less digits than its factorization.

990203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2124.

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 990203 is about 995.0894432160. The cubic root of 990203 is about 99.6723610328.

The spelling of 990203 in words is "nine hundred ninety thousand, two hundred three".