208739 has 2 divisors, whose sum is σ = 208740. Its totient is φ = 208738.

The previous prime is 208729. The next prime is 208759. The reversal of 208739 is 937802.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208739 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 208739.

It is not a weakly prime, because it can be changed into another prime (208729) 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, 104369 + 104370.

It is an arithmetic number, because the mean of its divisors is an integer number (104370).

2²⁰⁸⁷³⁹ is an apocalyptic number.

208739 is a deficient number, since it is larger than the sum of its proper divisors (1).

208739 is an equidigital number, since it uses as much as digits as its factorization.

208739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 208739 is about 456.8796340394. The cubic root of 208739 is about 59.3200078086.

The spelling of 208739 in words is "two hundred eight thousand, seven hundred thirty-nine".