205000669 has 2 divisors, whose sum is σ = 205000670. Its totient is φ = 205000668.

The previous prime is 205000667. The next prime is 205000711. The reversal of 205000669 is 966000502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202635225 + 2365444 = 14235^2 + 1538^2 .

It is a cyclic number.

It is not a de Polignac number, because 205000669 - 2¹ = 205000667 is a prime.

It is a super-3 number, since 3×205000669³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 205000667, 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 (205000667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102500334 + 102500335.

It is an arithmetic number, because the mean of its divisors is an integer number (102500335).

Almost surely, 2^205000669 is an apocalyptic number.

It is an amenable number.

205000669 is a deficient number, since it is larger than the sum of its proper divisors (1).

205000669 is an equidigital number, since it uses as much as digits as its factorization.

205000669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 205000669 is about 14317.8444257507. The cubic root of 205000669 is about 589.6374954062.

The spelling of 205000669 in words is "two hundred five million, six hundred sixty-nine", and thus it is an aban number.