199516189 has 2 divisors, whose sum is σ = 199516190. Its totient is φ = 199516188.

The previous prime is 199516183. The next prime is 199516193. The reversal of 199516189 is 981615991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143760100 + 55756089 = 11990^2 + 7467^2 .

It is a cyclic number.

It is not a de Polignac number, because 199516189 - 2¹⁷ = 199385117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199516183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99758094 + 99758095.

It is an arithmetic number, because the mean of its divisors is an integer number (99758095).

Almost surely, 2^199516189 is an apocalyptic number.

It is an amenable number.

199516189 is a deficient number, since it is larger than the sum of its proper divisors (1).

199516189 is an equidigital number, since it uses as much as digits as its factorization.

199516189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174960, while the sum is 49.

The square root of 199516189 is about 14125.0199645877. The cubic root of 199516189 is about 584.3316095744.

The spelling of 199516189 in words is "one hundred ninety-nine million, five hundred sixteen thousand, one hundred eighty-nine".