685386523 has 2 divisors, whose sum is σ = 685386524. Its totient is φ = 685386522.

The previous prime is 685386517. The next prime is 685386593. The reversal of 685386523 is 325683586.

685386523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 685386523 - 2⁹ = 685386011 is a prime.

It is not a weakly prime, because it can be changed into another prime (685386593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342693261 + 342693262.

It is an arithmetic number, because the mean of its divisors is an integer number (342693262).

Almost surely, 2^685386523 is an apocalyptic number.

685386523 is a deficient number, since it is larger than the sum of its proper divisors (1).

685386523 is an equidigital number, since it uses as much as digits as its factorization.

685386523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1036800, while the sum is 46.

The square root of 685386523 is about 26179.8877575898. The cubic root of 685386523 is about 881.6817542778.

The spelling of 685386523 in words is "six hundred eighty-five million, three hundred eighty-six thousand, five hundred twenty-three".