999000111 has 16 divisors (see below), whose sum is σ = 1390435808. Its totient is φ = 637372800.

The previous prime is 999000103. The next prime is 999000131. The reversal of 999000111 is 111000999.

It is not a de Polignac number, because 999000111 - 2³ = 999000103 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999000131) 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, 67000 + ... + 80541.

It is an arithmetic number, because the mean of its divisors is an integer number (86902238).

Almost surely, 2^999000111 is an apocalyptic number.

999000111 is a deficient number, since it is larger than the sum of its proper divisors (391435697).

999000111 is a wasteful number, since it uses less digits than its factorization.

999000111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147642.

The product of its (nonzero) digits is 729, while the sum is 30.

The square root of 999000111 is about 31606.9630145005. The cubic root of 999000111 is about 999.6665925185. Note that the first 3 decimals are identical.

The spelling of 999000111 in words is "nine hundred ninety-nine million, one hundred eleven", and thus it is an aban number.