685745413 has 2 divisors, whose sum is σ = 685745414. Its totient is φ = 685745412.

The previous prime is 685745407. The next prime is 685745449. The reversal of 685745413 is 314547586.

685745413 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 can be written as a sum of positive squares in only one way, i.e., 655462404 + 30283009 = 25602^2 + 5503^2 .

It is a cyclic number.

It is not a de Polignac number, because 685745413 - 2⁹ = 685744901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 685745413.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (685775413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342872706 + 342872707.

It is an arithmetic number, because the mean of its divisors is an integer number (342872707).

Almost surely, 2^685745413 is an apocalyptic number.

It is an amenable number.

685745413 is a deficient number, since it is larger than the sum of its proper divisors (1).

685745413 is an equidigital number, since it uses as much as digits as its factorization.

685745413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 403200, while the sum is 43.

The square root of 685745413 is about 26186.7411680033. The cubic root of 685745413 is about 881.8356195494.

The spelling of 685745413 in words is "six hundred eighty-five million, seven hundred forty-five thousand, four hundred thirteen".