685235339 has 2 divisors, whose sum is σ = 685235340. Its totient is φ = 685235338.

The previous prime is 685235333. The next prime is 685235363. The reversal of 685235339 is 933532586.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 685235339 - 2¹⁶ = 685169803 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 685235339.

It is not a weakly prime, because it can be changed into another prime (685235333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342617669 + 342617670.

It is an arithmetic number, because the mean of its divisors is an integer number (342617670).

Almost surely, 2^685235339 is an apocalyptic number.

685235339 is a deficient number, since it is larger than the sum of its proper divisors (1).

685235339 is an equidigital number, since it uses as much as digits as its factorization.

685235339 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 583200, while the sum is 44.

The square root of 685235339 is about 26177.0001910074. Note that the first 3 decimals coincide. The cubic root of 685235339 is about 881.6169217724.

The spelling of 685235339 in words is "six hundred eighty-five million, two hundred thirty-five thousand, three hundred thirty-nine".