206811043 has 2 divisors, whose sum is σ = 206811044. Its totient is φ = 206811042.

The previous prime is 206810993. The next prime is 206811047. The reversal of 206811043 is 340118602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206811043 - 2¹⁷ = 206679971 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 206810999 and 206811017.

It is not a weakly prime, because it can be changed into another prime (206811047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103405521 + 103405522.

It is an arithmetic number, because the mean of its divisors is an integer number (103405522).

Almost surely, 2^206811043 is an apocalyptic number.

206811043 is a deficient number, since it is larger than the sum of its proper divisors (1).

206811043 is an equidigital number, since it uses as much as digits as its factorization.

206811043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 206811043 is about 14380.9263609825. The cubic root of 206811043 is about 591.3681197346.

Adding to 206811043 its reverse (340118602), we get a palindrome (546929645).

The spelling of 206811043 in words is "two hundred six million, eight hundred eleven thousand, forty-three".