206939 has 2 divisors, whose sum is σ = 206940. Its totient is φ = 206938.

The previous prime is 206933. The next prime is 206951. The reversal of 206939 is 939602.

206939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206939 - 2⁴ = 206923 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (206933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103469 + 103470.

It is an arithmetic number, because the mean of its divisors is an integer number (103470).

2²⁰⁶⁹³⁹ is an apocalyptic number.

206939 is a deficient number, since it is larger than the sum of its proper divisors (1).

206939 is an equidigital number, since it uses as much as digits as its factorization.

206939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 206939 is about 454.9054846889. The cubic root of 206939 is about 59.1490057275.

It can be divided in two parts, 20693 and 9, that added together give a palindrome (20702).

The spelling of 206939 in words is "two hundred six thousand, nine hundred thirty-nine".