3680209 has 4 divisors (see below), whose sum is σ = 3963316. Its totient is φ = 3397104.

The previous prime is 3680203. The next prime is 3680213. The reversal of 3680209 is 9020863.

3680209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1849600 + 1830609 = 1360^2 + 1353^2 .

It is a cyclic number.

It is not a de Polignac number, because 3680209 - 2⁷ = 3680081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3680203) 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 3 ways as a sum of consecutive naturals, for example, 141534 + ... + 141559.

It is an arithmetic number, because the mean of its divisors is an integer number (990829).

Almost surely, 2^3680209 is an apocalyptic number.

It is an amenable number.

3680209 is a deficient number, since it is larger than the sum of its proper divisors (283107).

3680209 is a wasteful number, since it uses less digits than its factorization.

3680209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283106.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 3680209 is about 1918.3870829423. The cubic root of 3680209 is about 154.3917752919.

The spelling of 3680209 in words is "three million, six hundred eighty thousand, two hundred nine".