206189017 has 2 divisors, whose sum is σ = 206189018. Its totient is φ = 206189016.

The previous prime is 206188993. The next prime is 206189023. The reversal of 206189017 is 710981602.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112699456 + 93489561 = 10616^2 + 9669^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206189017 is a prime.

It is not a weakly prime, because it can be changed into another prime (206189077) 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, 103094508 + 103094509.

It is an arithmetic number, because the mean of its divisors is an integer number (103094509).

Almost surely, 2^206189017 is an apocalyptic number.

It is an amenable number.

206189017 is a deficient number, since it is larger than the sum of its proper divisors (1).

206189017 is an equidigital number, since it uses as much as digits as its factorization.

206189017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 206189017 is about 14359.2833038422. The cubic root of 206189017 is about 590.7746379603.

The spelling of 206189017 in words is "two hundred six million, one hundred eighty-nine thousand, seventeen".