685866301 has 2 divisors, whose sum is σ = 685866302. Its totient is φ = 685866300.

The previous prime is 685866287. The next prime is 685866329. The reversal of 685866301 is 103668586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 571162201 + 114704100 = 23899^2 + 10710^2 .

It is a cyclic number.

It is not a de Polignac number, because 685866301 - 2¹¹ = 685864253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (685866361) 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, 342933150 + 342933151.

It is an arithmetic number, because the mean of its divisors is an integer number (342933151).

Almost surely, 2^685866301 is an apocalyptic number.

It is an amenable number.

685866301 is a deficient number, since it is larger than the sum of its proper divisors (1).

685866301 is an equidigital number, since it uses as much as digits as its factorization.

685866301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 685866301 is about 26189.0492572755. The cubic root of 685866301 is about 881.8874352226.

The spelling of 685866301 in words is "six hundred eighty-five million, eight hundred sixty-six thousand, three hundred one".