3683809 has 4 divisors (see below), whose sum is σ = 3773700. Its totient is φ = 3593920.

The previous prime is 3683803. The next prime is 3683819. The reversal of 3683809 is 9083863.

It is a happy number.

3683809 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, and also an emirpimes, since its reverse is a distinct semiprime: 9083863 = 157 ⋅57859.

It can be written as a sum of positive squares in 2 ways, for example, as 944784 + 2739025 = 972^2 + 1655^2 .

It is a cyclic number.

It is not a de Polignac number, because 3683809 - 2⁹ = 3683297 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3683803) 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, 44884 + ... + 44965.

It is an arithmetic number, because the mean of its divisors is an integer number (943425).

Almost surely, 2^3683809 is an apocalyptic number.

It is an amenable number.

3683809 is a deficient number, since it is larger than the sum of its proper divisors (89891).

3683809 is an equidigital number, since it uses as much as digits as its factorization.

3683809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89890.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 3683809 is about 1919.3251418142. The cubic root of 3683809 is about 154.4421011708.

It can be divided in two parts, 36 and 83809, that added together give a triangular number (83845 = T₄₀₉).

The spelling of 3683809 in words is "three million, six hundred eighty-three thousand, eight hundred nine".