999968500 has 48 divisors (see below), whose sum is σ = 2204459712. Its totient is φ = 396228000.

The previous prime is 999968477. The next prime is 999968513. The reversal of 999968500 is 5869999.

It is a congruent 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, 44155 + ... + 62845.

It is an arithmetic number, because the mean of its divisors is an integer number (45926244).

Almost surely, 2^999968500 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 999968500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1102229856).

999968500 is an abundant number, since it is smaller than the sum of its proper divisors (1204491212).

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

999968500 is a wasteful number, since it uses less digits than its factorization.

999968500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18817 (or 18805 counting only the distinct ones).

The product of its (nonzero) digits is 1574640, while the sum is 55.

The square root of 999968500 is about 31622.2785390300. The cubic root of 999968500 is about 999.9894998897.

The spelling of 999968500 in words is "nine hundred ninety-nine million, nine hundred sixty-eight thousand, five hundred".