999970000 has 150 divisors (see below), whose sum is σ = 2564380698. Its totient is φ = 377568000.

The previous prime is 999969991. The next prime is 999970003. The reversal of 999970000 is 79999.

999970000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 5 ways, for example, as 569490496 + 430479504 = 23864^2 + 20748^2 .

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999970003) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 3609862 + ... + 3610138.

Almost surely, 2^999970000 is an apocalyptic number.

999970000 is the 20000-th heptagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999970000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1282190349).

999970000 is an abundant number, since it is smaller than the sum of its proper divisors (1564410698).

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

999970000 is a wasteful number, since it uses less digits than its factorization.

999970000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343 (or 303 counting only the distinct ones).

The product of its (nonzero) digits is 45927, while the sum is 43.

The square root of 999970000 is about 31622.3022564772. The cubic root of 999970000 is about 999.9899999000.

The spelling of 999970000 in words is "nine hundred ninety-nine million, nine hundred seventy thousand".