206442017 has 2 divisors, whose sum is σ = 206442018. Its totient is φ = 206442016.

The previous prime is 206441993. The next prime is 206442031. The reversal of 206442017 is 710244602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191573281 + 14868736 = 13841^2 + 3856^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206442017 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (206442037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103221008 + 103221009.

It is an arithmetic number, because the mean of its divisors is an integer number (103221009).

Almost surely, 2^206442017 is an apocalyptic number.

It is an amenable number.

206442017 is a deficient number, since it is larger than the sum of its proper divisors (1).

206442017 is an equidigital number, since it uses as much as digits as its factorization.

206442017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 206442017 is about 14368.0902349616. The cubic root of 206442017 is about 591.0161718276.

Adding to 206442017 its reverse (710244602), we get a palindrome (916686619).

The spelling of 206442017 in words is "two hundred six million, four hundred forty-two thousand, seventeen".