999982189 has 2 divisors, whose sum is σ = 999982190. Its totient is φ = 999982188.

The previous prime is 999982133. The next prime is 999982213. The reversal of 999982189 is 981289999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 625250025 + 374732164 = 25005^2 + 19358^2 .

It is an emirp because it is prime and its reverse (981289999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999982189 - 2¹¹ = 999980141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999982189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999982289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499991094 + 499991095.

It is an arithmetic number, because the mean of its divisors is an integer number (499991095).

Almost surely, 2^999982189 is an apocalyptic number.

It is an amenable number.

999982189 is a deficient number, since it is larger than the sum of its proper divisors (1).

999982189 is an equidigital number, since it uses as much as digits as its factorization.

999982189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7558272, while the sum is 64.

The square root of 999982189 is about 31622.4949837928. The cubic root of 999982189 is about 999.9940629648.

The spelling of 999982189 in words is "nine hundred ninety-nine million, nine hundred eighty-two thousand, one hundred eighty-nine".