205745563 has 2 divisors, whose sum is σ = 205745564. Its totient is φ = 205745562.

The previous prime is 205745537. The next prime is 205745569. The reversal of 205745563 is 365547502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205745563 - 2⁵ = 205745531 is a prime.

It is not a weakly prime, because it can be changed into another prime (205745569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102872781 + 102872782.

It is an arithmetic number, because the mean of its divisors is an integer number (102872782).

Almost surely, 2^205745563 is an apocalyptic number.

205745563 is a deficient number, since it is larger than the sum of its proper divisors (1).

205745563 is an equidigital number, since it uses as much as digits as its factorization.

205745563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 126000, while the sum is 37.

The square root of 205745563 is about 14343.8336228499. The cubic root of 205745563 is about 590.3508044948.

The spelling of 205745563 in words is "two hundred five million, seven hundred forty-five thousand, five hundred sixty-three".