206404061 has 2 divisors, whose sum is σ = 206404062. Its totient is φ = 206404060.

The previous prime is 206404039. The next prime is 206404073. The reversal of 206404061 is 160404602.

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., 179051161 + 27352900 = 13381^2 + 5230^2 .

It is a cyclic number.

It is not a de Polignac number, because 206404061 - 2⁶ = 206403997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206404661) 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, 103202030 + 103202031.

It is an arithmetic number, because the mean of its divisors is an integer number (103202031).

Almost surely, 2^206404061 is an apocalyptic number.

It is an amenable number.

206404061 is a deficient number, since it is larger than the sum of its proper divisors (1).

206404061 is an equidigital number, since it uses as much as digits as its factorization.

206404061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 206404061 is about 14366.7693306463. The cubic root of 206404061 is about 590.9799486060.

Adding to 206404061 its reverse (160404602), we get a palindrome (366808663).

The spelling of 206404061 in words is "two hundred six million, four hundred four thousand, sixty-one".