999112209 has 4 divisors (see below), whose sum is σ = 1332149616. Its totient is φ = 666074804.

The previous prime is 999112193. The next prime is 999112211. The reversal of 999112209 is 902211999.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 999112209 - 2⁴ = 999112193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (999112259) 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, 166518699 + ... + 166518704.

It is an arithmetic number, because the mean of its divisors is an integer number (333037404).

Almost surely, 2^999112209 is an apocalyptic number.

It is an amenable number.

999112209 is a deficient number, since it is larger than the sum of its proper divisors (333037407).

999112209 is a wasteful number, since it uses less digits than its factorization.

999112209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333037406.

The product of its (nonzero) digits is 26244, while the sum is 42.

The square root of 999112209 is about 31608.7362765423. The cubic root of 999112209 is about 999.7039820487.

The spelling of 999112209 in words is "nine hundred ninety-nine million, one hundred twelve thousand, two hundred nine".