206681141 has 2 divisors, whose sum is σ = 206681142. Its totient is φ = 206681140.

The previous prime is 206681129. The next prime is 206681159. The reversal of 206681141 is 141186602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205922500 + 758641 = 14350^2 + 871^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206681141 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206681441) 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, 103340570 + 103340571.

It is an arithmetic number, because the mean of its divisors is an integer number (103340571).

Almost surely, 2^206681141 is an apocalyptic number.

It is an amenable number.

206681141 is a deficient number, since it is larger than the sum of its proper divisors (1).

206681141 is an equidigital number, since it uses as much as digits as its factorization.

206681141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 206681141 is about 14376.4091831027. The cubic root of 206681141 is about 591.2442772325.

The spelling of 206681141 in words is "two hundred six million, six hundred eighty-one thousand, one hundred forty-one".