682108209 has 20 divisors (see below), whose sum is σ = 1046495604. Its totient is φ = 442446624.

The previous prime is 682108129. The next prime is 682108211. The reversal of 682108209 is 902801286.

It can be written as a sum of positive squares in 2 ways, for example, as 355511025 + 326597184 = 18855^2 + 18072^2 .

It is not a de Polignac number, because 682108209 - 2⁷ = 682108081 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (682108109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 110802 + ... + 116795.

Almost surely, 2^682108209 is an apocalyptic number.

It is an amenable number.

682108209 is a deficient number, since it is larger than the sum of its proper divisors (364387395).

682108209 is a wasteful number, since it uses less digits than its factorization.

682108209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227646 (or 227637 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 682108209 is about 26117.2014006095. The cubic root of 682108209 is about 880.2737651164.

The spelling of 682108209 in words is "six hundred eighty-two million, one hundred eight thousand, two hundred nine".