3644321 has 2 divisors, whose sum is σ = 3644322. Its totient is φ = 3644320.

The previous prime is 3644317. The next prime is 3644339. The reversal of 3644321 is 1234463.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2512225 + 1132096 = 1585^2 + 1064^2 .

It is an emirp because it is prime and its reverse (1234463) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3644321 - 2² = 3644317 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3644351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1822160 + 1822161.

It is an arithmetic number, because the mean of its divisors is an integer number (1822161).

Almost surely, 2^3644321 is an apocalyptic number.

It is an amenable number.

3644321 is a deficient number, since it is larger than the sum of its proper divisors (1).

3644321 is an equidigital number, since it uses as much as digits as its factorization.

3644321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 23.

The square root of 3644321 is about 1909.0104766606. The cubic root of 3644321 is about 153.8882784456. Note that the first 3 decimals are identical.

Adding to 3644321 its reverse (1234463), we get a palindrome (4878784).

The spelling of 3644321 in words is "three million, six hundred forty-four thousand, three hundred twenty-one".