3631321 has 2 divisors, whose sum is σ = 3631322. Its totient is φ = 3631320.

The previous prime is 3631249. The next prime is 3631339. The reversal of 3631321 is 1231363.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2890000 + 741321 = 1700^2 + 861^2 .

It is a cyclic number.

It is not a de Polignac number, because 3631321 - 2¹⁹ = 3107033 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3631921) 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, 1815660 + 1815661.

It is an arithmetic number, because the mean of its divisors is an integer number (1815661).

Almost surely, 2^3631321 is an apocalyptic number.

It is an amenable number.

3631321 is a deficient number, since it is larger than the sum of its proper divisors (1).

3631321 is an equidigital number, since it uses as much as digits as its factorization.

3631321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324, while the sum is 19.

The square root of 3631321 is about 1905.6025293854. The cubic root of 3631321 is about 153.7050773202.

Adding to 3631321 its reverse (1231363), we get a palindrome (4862684).

The spelling of 3631321 in words is "three million, six hundred thirty-one thousand, three hundred twenty-one".