206057249 has 2 divisors, whose sum is σ = 206057250. Its totient is φ = 206057248.

The previous prime is 206057239. The next prime is 206057251. The reversal of 206057249 is 942750602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194881600 + 11175649 = 13960^2 + 3343^2 .

It is a cyclic number.

It is not a de Polignac number, because 206057249 - 2⁸ = 206056993 is a prime.

It is a Sophie Germain prime.

Together with 206057251, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (206057219) 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, 103028624 + 103028625.

It is an arithmetic number, because the mean of its divisors is an integer number (103028625).

Almost surely, 2^206057249 is an apocalyptic number.

It is an amenable number.

206057249 is a deficient number, since it is larger than the sum of its proper divisors (1).

206057249 is an equidigital number, since it uses as much as digits as its factorization.

206057249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 206057249 is about 14354.6943192811. The cubic root of 206057249 is about 590.6487635204.

The spelling of 206057249 in words is "two hundred six million, fifty-seven thousand, two hundred forty-nine".