685528301 has 2 divisors, whose sum is σ = 685528302. Its totient is φ = 685528300.

The previous prime is 685528279. The next prime is 685528331. The reversal of 685528301 is 103825586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 574752676 + 110775625 = 23974^2 + 10525^2 .

It is a cyclic number.

It is not a de Polignac number, because 685528301 - 2¹⁴ = 685511917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (685528331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342764150 + 342764151.

It is an arithmetic number, because the mean of its divisors is an integer number (342764151).

Almost surely, 2^685528301 is an apocalyptic number.

It is an amenable number.

685528301 is a deficient number, since it is larger than the sum of its proper divisors (1).

685528301 is an equidigital number, since it uses as much as digits as its factorization.

685528301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 685528301 is about 26182.5953831930. The cubic root of 685528301 is about 881.7425445294.

The spelling of 685528301 in words is "six hundred eighty-five million, five hundred twenty-eight thousand, three hundred one".