200905189 has 2 divisors, whose sum is σ = 200905190. Its totient is φ = 200905188.

The previous prime is 200905181. The next prime is 200905217. The reversal of 200905189 is 981509002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178008964 + 22896225 = 13342^2 + 4785^2 .

It is a cyclic number.

It is not a de Polignac number, because 200905189 - 2³ = 200905181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200905181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100452594 + 100452595.

It is an arithmetic number, because the mean of its divisors is an integer number (100452595).

Almost surely, 2^200905189 is an apocalyptic number.

It is an amenable number.

200905189 is a deficient number, since it is larger than the sum of its proper divisors (1).

200905189 is an equidigital number, since it uses as much as digits as its factorization.

200905189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 200905189 is about 14174.1027581995. The cubic root of 200905189 is about 585.6844828523.

The spelling of 200905189 in words is "two hundred million, nine hundred five thousand, one hundred eighty-nine".