205606573 has 2 divisors, whose sum is σ = 205606574. Its totient is φ = 205606572.

The previous prime is 205606571. The next prime is 205606579. The reversal of 205606573 is 375606502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130576329 + 75030244 = 11427^2 + 8662^2 .

It is a cyclic number.

It is not a de Polignac number, because 205606573 - 2¹ = 205606571 is a prime.

Together with 205606571, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205606571) 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, 102803286 + 102803287.

It is an arithmetic number, because the mean of its divisors is an integer number (102803287).

Almost surely, 2^205606573 is an apocalyptic number.

It is an amenable number.

205606573 is a deficient number, since it is larger than the sum of its proper divisors (1).

205606573 is an equidigital number, since it uses as much as digits as its factorization.

205606573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 34.

The square root of 205606573 is about 14338.9878652574. The cubic root of 205606573 is about 590.2178387404.

The spelling of 205606573 in words is "two hundred five million, six hundred six thousand, five hundred seventy-three".