999718912 has 32 divisors (see below), whose sum is σ = 1999472850. Its totient is φ = 499843072.

The previous prime is 999718883. The next prime is 999718921. The reversal of 999718912 is 219817999.

It can be written as a sum of positive squares in only one way, i.e., 999571456 + 147456 = 31616^2 + 384^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17514 + ... + 48022.

Almost surely, 2^999718912 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 999718912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (999736425).

999718912 is an abundant number, since it is smaller than the sum of its proper divisors (999753938).

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

999718912 is an frugal number, since it uses more digits than its factorization.

999718912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30539 (or 30511 counting only the distinct ones).

The product of its digits is 734832, while the sum is 55.

The square root of 999718912 is about 31618.3318978089. The cubic root of 999718912 is about 999.9062952197.

The spelling of 999718912 in words is "nine hundred ninety-nine million, seven hundred eighteen thousand, nine hundred twelve".