206681441 has 2 divisors, whose sum is σ = 206681442. Its totient is φ = 206681440.

The previous prime is 206681437. The next prime is 206681467. The reversal of 206681441 is 144186602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174134416 + 32547025 = 13196^2 + 5705^2 .

It is a cyclic number.

It is not a de Polignac number, because 206681441 - 2² = 206681437 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 206681398 and 206681407.

It is not a weakly prime, because it can be changed into another prime (206681471) 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, 103340720 + 103340721.

It is an arithmetic number, because the mean of its divisors is an integer number (103340721).

Almost surely, 2^206681441 is an apocalyptic number.

It is an amenable number.

206681441 is a deficient number, since it is larger than the sum of its proper divisors (1).

206681441 is an equidigital number, since it uses as much as digits as its factorization.

206681441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 206681441 is about 14376.4196168587. The cubic root of 206681441 is about 591.2445632982.

The spelling of 206681441 in words is "two hundred six million, six hundred eighty-one thousand, four hundred forty-one".