16189 has 2 divisors, whose sum is σ = 16190. Its totient is φ = 16188.

The previous prime is 16187. The next prime is 16193. The reversal of 16189 is 98161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13689 + 2500 = 117^2 + 50^2 .

It is a cyclic number.

It is not a de Polignac number, because 16189 - 2¹ = 16187 is a prime.

Together with 16187, it forms a pair of twin primes.

It is an alternating number because its digits alternate between odd and even.

It is a plaindrome in base 11.

It is a zygodrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8094 + 8095.

It is an arithmetic number, because the mean of its divisors is an integer number (8095).

2¹⁶¹⁸⁹ is an apocalyptic number.

It is an amenable number.

16189 is a deficient number, since it is larger than the sum of its proper divisors (1).

16189 is an equidigital number, since it uses as much as digits as its factorization.

16189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 25.

The square root of 16189 is about 127.2360011946. The cubic root of 16189 is about 25.2972516504.

The spelling of 16189 in words is "sixteen thousand, one hundred eighty-nine".