206819002889 has 2 divisors, whose sum is σ = 206819002890. Its totient is φ = 206819002888.

The previous prime is 206819002867. The next prime is 206819002927. The reversal of 206819002889 is 988200918602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137702592889 + 69116410000 = 371083^2 + 262900^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206819002889 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 206819002889.

It is not a weakly prime, because it can be changed into another prime (206819002829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103409501444 + 103409501445.

It is an arithmetic number, because the mean of its divisors is an integer number (103409501445).

Almost surely, 2^206819002889 is an apocalyptic number.

It is an amenable number.

206819002889 is a deficient number, since it is larger than the sum of its proper divisors (1).

206819002889 is an equidigital number, since it uses as much as digits as its factorization.

206819002889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 995328, while the sum is 53.

The spelling of 206819002889 in words is "two hundred six billion, eight hundred nineteen million, two thousand, eight hundred eighty-nine".