3683221 has 4 divisors (see below), whose sum is σ = 3687552. Its totient is φ = 3678892.

The previous prime is 3683213. The next prime is 3683227. The reversal of 3683221 is 1223863.

3683221 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 Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 3683221 - 2³ = 3683213 is a prime.

It is a super-2 number, since 2×3683221² = 27132233869682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3683227) 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, 421 + ... + 2746.

It is an arithmetic number, because the mean of its divisors is an integer number (921888).

Almost surely, 2^3683221 is an apocalyptic number.

It is an amenable number.

3683221 is a deficient number, since it is larger than the sum of its proper divisors (4331).

3683221 is a wasteful number, since it uses less digits than its factorization.

3683221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4330.

The product of its digits is 1728, while the sum is 25.

The square root of 3683221 is about 1919.1719568606. The cubic root of 3683221 is about 154.4338835182.

The spelling of 3683221 in words is "three million, six hundred eighty-three thousand, two hundred twenty-one".