206539841 has 2 divisors, whose sum is σ = 206539842. Its totient is φ = 206539840.

The previous prime is 206539829. The next prime is 206539843. The reversal of 206539841 is 148935602.

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., 158860816 + 47679025 = 12604^2 + 6905^2 .

It is a cyclic number.

It is not a de Polignac number, because 206539841 - 2¹⁸ = 206277697 is a prime.

Together with 206539843, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 206539795 and 206539804.

It is not a weakly prime, because it can be changed into another prime (206539843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103269920 + 103269921.

It is an arithmetic number, because the mean of its divisors is an integer number (103269921).

Almost surely, 2^206539841 is an apocalyptic number.

It is an amenable number.

206539841 is a deficient number, since it is larger than the sum of its proper divisors (1).

206539841 is an equidigital number, since it uses as much as digits as its factorization.

206539841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 206539841 is about 14371.4940420264. The cubic root of 206539841 is about 591.1095094745.

The spelling of 206539841 in words is "two hundred six million, five hundred thirty-nine thousand, eight hundred forty-one".