990223 has 12 divisors (see below), whose sum is σ = 1130808. Its totient is φ = 861840.

The previous prime is 990211. The next prime is 990239. The reversal of 990223 is 322099.

It is a de Polignac number, because none of the positive numbers 2^k-990223 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990293) 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 11 ways as a sum of consecutive naturals, for example, 4588 + ... + 4798.

It is an arithmetic number, because the mean of its divisors is an integer number (94234).

2⁹⁹⁰²²³ is an apocalyptic number.

990223 is a deficient number, since it is larger than the sum of its proper divisors (140585).

990223 is a wasteful number, since it uses less digits than its factorization.

990223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262 (or 243 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 990223 is about 995.0994925132. The cubic root of 990223 is about 99.6730320850.

The spelling of 990223 in words is "nine hundred ninety thousand, two hundred twenty-three".