206103109 has 2 divisors, whose sum is σ = 206103110. Its totient is φ = 206103108.

The previous prime is 206103101. The next prime is 206103133. The reversal of 206103109 is 901301602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166978084 + 39125025 = 12922^2 + 6255^2 .

It is a cyclic number.

It is not a de Polignac number, because 206103109 - 2³ = 206103101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206103109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206103101) 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, 103051554 + 103051555.

It is an arithmetic number, because the mean of its divisors is an integer number (103051555).

Almost surely, 2^206103109 is an apocalyptic number.

It is an amenable number.

206103109 is a deficient number, since it is larger than the sum of its proper divisors (1).

206103109 is an equidigital number, since it uses as much as digits as its factorization.

206103109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 206103109 is about 14356.2916172666. The cubic root of 206103109 is about 590.6925784362.

The spelling of 206103109 in words is "two hundred six million, one hundred three thousand, one hundred nine".