685403303867 has 2 divisors, whose sum is σ = 685403303868. Its totient is φ = 685403303866.

The previous prime is 685403303857. The next prime is 685403303869. The reversal of 685403303867 is 768303304586.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 685403303867 - 2⁶ = 685403303803 is a prime.

Together with 685403303869, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (685403303869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342701651933 + 342701651934.

It is an arithmetic number, because the mean of its divisors is an integer number (342701651934).

Almost surely, 2^685403303867 is an apocalyptic number.

685403303867 is a deficient number, since it is larger than the sum of its proper divisors (1).

685403303867 is an equidigital number, since it uses as much as digits as its factorization.

685403303867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8709120, while the sum is 53.

The spelling of 685403303867 in words is "six hundred eighty-five billion, four hundred three million, three hundred three thousand, eight hundred sixty-seven".