3684661 has 4 divisors (see below), whose sum is σ = 3688524. Its totient is φ = 3680800.

The previous prime is 3684647. The next prime is 3684671. The reversal of 3684661 is 1664863.

3684661 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 a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3186225 + 498436 = 1785^2 + 706^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3684661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3684601) 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, 651 + ... + 2791.

It is an arithmetic number, because the mean of its divisors is an integer number (922131).

Almost surely, 2^3684661 is an apocalyptic number.

It is an amenable number.

3684661 is a deficient number, since it is larger than the sum of its proper divisors (3863).

3684661 is a wasteful number, since it uses less digits than its factorization.

3684661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3862.

The product of its digits is 20736, while the sum is 34.

The square root of 3684661 is about 1919.5470819962. The cubic root of 3684661 is about 154.4540068303.

The spelling of 3684661 in words is "three million, six hundred eighty-four thousand, six hundred sixty-one".