16889189 has 2 divisors, whose sum is σ = 16889190. Its totient is φ = 16889188.

The previous prime is 16889183. The next prime is 16889221. The reversal of 16889189 is 98198861.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16265089 + 624100 = 4033^2 + 790^2 .

It is a cyclic number.

It is not a de Polignac number, because 16889189 - 2¹² = 16885093 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16889183) 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, 8444594 + 8444595.

It is an arithmetic number, because the mean of its divisors is an integer number (8444595).

Almost surely, 2^16889189 is an apocalyptic number.

It is an amenable number.

16889189 is a deficient number, since it is larger than the sum of its proper divisors (1).

16889189 is an equidigital number, since it uses as much as digits as its factorization.

16889189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 50.

The square root of 16889189 is about 4109.6458484887. The cubic root of 16889189 is about 256.5682617839.

The spelling of 16889189 in words is "sixteen million, eight hundred eighty-nine thousand, one hundred eighty-nine".