680225209 has 2 divisors, whose sum is σ = 680225210. Its totient is φ = 680225208.

The previous prime is 680225201. The next prime is 680225261. The reversal of 680225209 is 902522086.

680225209 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., 353628025 + 326597184 = 18805^2 + 18072^2 .

It is a cyclic number.

It is not a de Polignac number, because 680225209 - 2³ = 680225201 is a prime.

It is not a weakly prime, because it can be changed into another prime (680225201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340112604 + 340112605.

It is an arithmetic number, because the mean of its divisors is an integer number (340112605).

Almost surely, 2^680225209 is an apocalyptic number.

It is an amenable number.

680225209 is a deficient number, since it is larger than the sum of its proper divisors (1).

680225209 is an equidigital number, since it uses as much as digits as its factorization.

680225209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 680225209 is about 26081.1274487895. The cubic root of 680225209 is about 879.4630026981.

The spelling of 680225209 in words is "six hundred eighty million, two hundred twenty-five thousand, two hundred nine".