685222858039 has 2 divisors, whose sum is σ = 685222858040. Its totient is φ = 685222858038.

The previous prime is 685222858013. The next prime is 685222858043. The reversal of 685222858039 is 930858222586.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 685222858039 - 2⁵ = 685222858007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (685222858339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342611429019 + 342611429020.

It is an arithmetic number, because the mean of its divisors is an integer number (342611429020).

Almost surely, 2^685222858039 is an apocalyptic number.

685222858039 is a deficient number, since it is larger than the sum of its proper divisors (1).

685222858039 is an equidigital number, since it uses as much as digits as its factorization.

685222858039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16588800, while the sum is 58.

The spelling of 685222858039 in words is "six hundred eighty-five billion, two hundred twenty-two million, eight hundred fifty-eight thousand, thirty-nine".