205045189 has 2 divisors, whose sum is σ = 205045190. Its totient is φ = 205045188.

The previous prime is 205045171. The next prime is 205045219. The reversal of 205045189 is 981540502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204633025 + 412164 = 14305^2 + 642^2 .

It is a cyclic number.

It is not a de Polignac number, because 205045189 - 2⁹ = 205044677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205045289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102522594 + 102522595.

It is an arithmetic number, because the mean of its divisors is an integer number (102522595).

Almost surely, 2^205045189 is an apocalyptic number.

It is an amenable number.

205045189 is a deficient number, since it is larger than the sum of its proper divisors (1).

205045189 is an equidigital number, since it uses as much as digits as its factorization.

205045189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 205045189 is about 14319.3990446527. The cubic root of 205045189 is about 589.6801761795.

The spelling of 205045189 in words is "two hundred five million, forty-five thousand, one hundred eighty-nine".