206819441 has 2 divisors, whose sum is σ = 206819442. Its totient is φ = 206819440.

The previous prime is 206819413. The next prime is 206819443. The reversal of 206819441 is 144918602.

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., 156975841 + 49843600 = 12529^2 + 7060^2 .

It is a cyclic number.

It is not a de Polignac number, because 206819441 - 2⁶ = 206819377 is a prime.

Together with 206819443, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (206819443) 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, 103409720 + 103409721.

It is an arithmetic number, because the mean of its divisors is an integer number (103409721).

Almost surely, 2^206819441 is an apocalyptic number.

It is an amenable number.

206819441 is a deficient number, since it is larger than the sum of its proper divisors (1).

206819441 is an equidigital number, since it uses as much as digits as its factorization.

206819441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 206819441 is about 14381.2183419904. The cubic root of 206819441 is about 591.3761242109.

The spelling of 206819441 in words is "two hundred six million, eight hundred nineteen thousand, four hundred forty-one".