It is a happy number.
2003 is nontrivially palindromic in base 15.
It is a weak prime.
It is a cyclic number.
It is a Sophie Germain prime.
It is a Chen prime.
It is a hungry number.
2003 is an undulating number in base 15.
It is a plaindrome in base 12.
It is a nialpdrome in base 13 and base 14.
2003 is an equidigital number, since it uses as much as digits as its factorization.
2003 is an evil number, because the sum of its binary digits is even.
The square root of 2003 is about 44.7548880012. The cubic root of 2003 is about 12.6055069570.
Adding to 2003 its reverse (3002), we get a palindrome (5005).
Subtracting 2003 from its reverse (3002), we obtain a palindrome (999).
The spelling of 2003 in words is "two thousand, three", and thus it is an iban number.