2003321 has 2 divisors, whose sum is σ = 2003322. Its totient is φ = 2003320.

The previous prime is 2003299. The next prime is 2003329. The reversal of 2003321 is 1233002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1345600 + 657721 = 1160^2 + 811^2 .

It is a cyclic number.

It is not a de Polignac number, because 2003321 - 2⁶ = 2003257 is a prime.

It is not a weakly prime, because it can be changed into another prime (2003329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001660 + 1001661.

It is an arithmetic number, because the mean of its divisors is an integer number (1001661).

2^2003321 is an apocalyptic number.

It is an amenable number.

2003321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2003321 is an equidigital number, since it uses as much as digits as its factorization.

2003321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 2003321 is about 1415.3872261682. The cubic root of 2003321 is about 126.0618030559.

Adding to 2003321 its reverse (1233002), we get a palindrome (3236323).

The spelling of 2003321 in words is "two million, three thousand, three hundred twenty-one".