205069 has 2 divisors, whose sum is σ = 205070. Its totient is φ = 205068.

The previous prime is 205063. The next prime is 205081. The reversal of 205069 is 960502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191844 + 13225 = 438^2 + 115^2 .

It is a cyclic number.

It is not a de Polignac number, because 205069 - 2⁹ = 204557 is a prime.

It is a super-2 number, since 2×205069² = 84106589522, which contains 22 as substring.

205069 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102534 + 102535.

It is an arithmetic number, because the mean of its divisors is an integer number (102535).

2²⁰⁵⁰⁶⁹ is an apocalyptic number.

It is an amenable number.

205069 is a deficient number, since it is larger than the sum of its proper divisors (1).

205069 is an equidigital number, since it uses as much as digits as its factorization.

205069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 205069 is about 452.8454482492. The cubic root of 205069 is about 58.9703000955.

The spelling of 205069 in words is "two hundred five thousand, sixty-nine".