206759939 has 2 divisors, whose sum is σ = 206759940. Its totient is φ = 206759938.

The previous prime is 206759929. The next prime is 206759951. The reversal of 206759939 is 939957602.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206759939 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (206759929) 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, 103379969 + 103379970.

It is an arithmetic number, because the mean of its divisors is an integer number (103379970).

Almost surely, 2^206759939 is an apocalyptic number.

206759939 is a deficient number, since it is larger than the sum of its proper divisors (1).

206759939 is an equidigital number, since it uses as much as digits as its factorization.

206759939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 918540, while the sum is 50.

The square root of 206759939 is about 14379.1494532883. The cubic root of 206759939 is about 591.3194057563.

The spelling of 206759939 in words is "two hundred six million, seven hundred fifty-nine thousand, nine hundred thirty-nine".