999319000 has 64 divisors (see below), whose sum is σ = 2343556800. Its totient is φ = 398848000.

The previous prime is 999318997. The next prime is 999319001. The reversal of 999319000 is 913999.

999319000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×999319000² = 1997276927522000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999319001) 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, 640221 + ... + 641779.

It is an arithmetic number, because the mean of its divisors is an integer number (36618075).

Almost surely, 2^999319000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999319000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1171778400).

999319000 is an abundant number, since it is smaller than the sum of its proper divisors (1344237800).

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

999319000 is a wasteful number, since it uses less digits than its factorization.

999319000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2221 (or 2207 counting only the distinct ones).

The product of its (nonzero) digits is 19683, while the sum is 40.

The square root of 999319000 is about 31612.0072124501. The cubic root of 999319000 is about 999.7729484515.

The spelling of 999319000 in words is "nine hundred ninety-nine million, three hundred nineteen thousand".