999020223 has 20 divisors (see below), whose sum is σ = 1499462008. Its totient is φ = 662845680.

The previous prime is 999020201. The next prime is 999020233. The reversal of 999020223 is 322020999.

It is not a de Polignac number, because 999020223 - 2⁹ = 999019711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999020233) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12136 + ... + 46317.

Almost surely, 2^999020223 is an apocalyptic number.

999020223 is a deficient number, since it is larger than the sum of its proper divisors (500441785).

999020223 is a wasteful number, since it uses less digits than its factorization.

999020223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58676 (or 58667 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 999020223 is about 31607.2811706417. The cubic root of 999020223 is about 999.6733009460.

The spelling of 999020223 in words is "nine hundred ninety-nine million, twenty thousand, two hundred twenty-three".