999112189 has 2 divisors, whose sum is σ = 999112190. Its totient is φ = 999112188.

The previous prime is 999112183. The next prime is 999112193. The reversal of 999112189 is 981211999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 990172089 + 8940100 = 31467^2 + 2990^2 .

It is a cyclic number.

It is not a de Polignac number, because 999112189 - 2⁷ = 999112061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999112183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499556094 + 499556095.

It is an arithmetic number, because the mean of its divisors is an integer number (499556095).

Almost surely, 2^999112189 is an apocalyptic number.

It is an amenable number.

999112189 is a deficient number, since it is larger than the sum of its proper divisors (1).

999112189 is an equidigital number, since it uses as much as digits as its factorization.

999112189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 49.

The square root of 999112189 is about 31608.7359601740. The cubic root of 999112189 is about 999.7039753781.

The spelling of 999112189 in words is "nine hundred ninety-nine million, one hundred twelve thousand, one hundred eighty-nine".