683909 has 2 divisors, whose sum is σ = 683910. Its totient is φ = 683908.

The previous prime is 683899. The next prime is 683911. The reversal of 683909 is 909386.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 386884 + 297025 = 622^2 + 545^2 .

It is a cyclic number.

It is not a de Polignac number, because 683909 - 2⁸ = 683653 is a prime.

It is a Sophie Germain prime.

Together with 683911, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (683939) 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, 341954 + 341955.

It is an arithmetic number, because the mean of its divisors is an integer number (341955).

2⁶⁸³⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

683909 is a deficient number, since it is larger than the sum of its proper divisors (1).

683909 is an equidigital number, since it uses as much as digits as its factorization.

683909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 683909 is about 826.9879080132. The cubic root of 683909 is about 88.1047736220.

The spelling of 683909 in words is "six hundred eighty-three thousand, nine hundred nine".