999900016 has 20 divisors (see below), whose sum is σ = 2051266032. Its totient is φ = 470541056.

The previous prime is 999899987. The next prime is 999900017. The reversal of 999900016 is 610009999.

999900016 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999900017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1837780 + ... + 1838323.

Almost surely, 2^999900016 is an apocalyptic number.

It is an amenable number.

999900016 is an abundant number, since it is smaller than the sum of its proper divisors (1051366016).

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

999900016 is a wasteful number, since it uses less digits than its factorization.

999900016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3676128 (or 3676122 counting only the distinct ones).

The product of its (nonzero) digits is 39366, while the sum is 43.

The square root of 999900016 is about 31621.1956763181. The cubic root of 999900016 is about 999.9666708892.

It can be divided in two parts, 9 and 99900016, that added together give a square (99900025 = 9995²).

The spelling of 999900016 in words is "nine hundred ninety-nine million, nine hundred thousand, sixteen".