999818994 has 32 divisors (see below), whose sum is σ = 2118864960. Its totient is φ = 313431552.

The previous prime is 999818987. The next prime is 999819001. The reversal of 999818994 is 499818999.

999818994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (999818987) and next prime (999819001).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172902 + ... + 178590.

It is an arithmetic number, because the mean of its divisors is an integer number (66214530).

Almost surely, 2^999818994 is an apocalyptic number.

999818994 is an abundant number, since it is smaller than the sum of its proper divisors (1119045966).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999818994 is a wasteful number, since it uses less digits than its factorization.

999818994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7434.

The product of its digits is 15116544, while the sum is 66.

The square root of 999818994 is about 31619.9145160135. The cubic root of 999818994 is about 999.9396610259.

The spelling of 999818994 in words is "nine hundred ninety-nine million, eight hundred eighteen thousand, nine hundred ninety-four".