206505449 has 2 divisors, whose sum is σ = 206505450. Its totient is φ = 206505448.

The previous prime is 206505391. The next prime is 206505469. The reversal of 206505449 is 944505602.

It is a happy number.

206505449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178489600 + 28015849 = 13360^2 + 5293^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206505449 is a prime.

It is not a weakly prime, because it can be changed into another prime (206505469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103252724 + 103252725.

It is an arithmetic number, because the mean of its divisors is an integer number (103252725).

Almost surely, 2^206505449 is an apocalyptic number.

It is an amenable number.

206505449 is a deficient number, since it is larger than the sum of its proper divisors (1).

206505449 is an equidigital number, since it uses as much as digits as its factorization.

206505449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 206505449 is about 14370.2974569074. The cubic root of 206505449 is about 591.0766981024.

The spelling of 206505449 in words is "two hundred six million, five hundred five thousand, four hundred forty-nine".