206165249 has 2 divisors, whose sum is σ = 206165250. Its totient is φ = 206165248.

The previous prime is 206165233. The next prime is 206165251. The reversal of 206165249 is 942561602.

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., 201838849 + 4326400 = 14207^2 + 2080^2 .

It is a cyclic number.

It is not a de Polignac number, because 206165249 - 2⁴ = 206165233 is a prime.

Together with 206165251, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (206165279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103082624 + 103082625.

It is an arithmetic number, because the mean of its divisors is an integer number (103082625).

Almost surely, 2^206165249 is an apocalyptic number.

It is an amenable number.

206165249 is a deficient number, since it is larger than the sum of its proper divisors (1).

206165249 is an equidigital number, since it uses as much as digits as its factorization.

206165249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 206165249 is about 14358.4556620829. The cubic root of 206165249 is about 590.7519369918.

The spelling of 206165249 in words is "two hundred six million, one hundred sixty-five thousand, two hundred forty-nine".