999334221 has 16 divisors (see below), whose sum is σ = 1373172864. Its totient is φ = 645983424.

The previous prime is 999334213. The next prime is 999334243. The reversal of 999334221 is 122433999.

It is not a de Polignac number, because 999334221 - 2³ = 999334213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999334211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17160 + ... + 47886.

It is an arithmetic number, because the mean of its divisors is an integer number (85823304).

Almost surely, 2^999334221 is an apocalyptic number.

It is an amenable number.

999334221 is a deficient number, since it is larger than the sum of its proper divisors (373838643).

999334221 is a wasteful number, since it uses less digits than its factorization.

999334221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31060.

The product of its digits is 104976, while the sum is 42.

The square root of 999334221 is about 31612.2479586631. The cubic root of 999334221 is about 999.7780243971.

The spelling of 999334221 in words is "nine hundred ninety-nine million, three hundred thirty-four thousand, two hundred twenty-one".