999813000 has 64 divisors (see below), whose sum is σ = 3119425920. Its totient is φ = 266616000.

The previous prime is 999812987. The next prime is 999813007. The reversal of 999813000 is 318999.

It is a self number, because there is not a number n which added to its sum of digits gives 999813000.

It is not an unprimeable number, because it can be changed into a prime (999813007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163636 + ... + 169635.

It is an arithmetic number, because the mean of its divisors is an integer number (48741030).

Almost surely, 2^999813000 is an apocalyptic number.

It is an amenable number.

999813000 is an abundant number, since it is smaller than the sum of its proper divisors (2119612920).

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

999813000 is a wasteful number, since it uses less digits than its factorization.

999813000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333295 (or 333281 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 999813000 is about 31619.8197338315. The cubic root of 999813000 is about 999.9376627808.

The spelling of 999813000 in words is "nine hundred ninety-nine million, eight hundred thirteen thousand".