2003 has 2 divisors, whose sum is σ = 2004.
Its totient is φ = 2002.
The previous prime is 1999. The next prime is 2011. The reversal of 2003 is 3002.
It is a happy number.
2003 is nontrivially palindromic in base 15.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 2003 - 22 = 1999 is a prime.
It is a Sophie Germain prime.
It is a Chen prime.
It is a hungry number.
2003 is an undulating number in base 15.
2003 is a modest number, since divided by 3 gives 2 as remainder.
It is a plaindrome in base 12.
It is a nialpdrome in base 13 and base 14.
It is not a weakly prime, because it can be changed into another prime (2053) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001 + 1002.
It is an arithmetic number, because the mean of its divisors is an integer number (1002).
2003 is a deficient number, since it is larger than the sum of its proper divisors (1).
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 product of its (nonzero) digits is 6, while the sum is 5.
The square root of 2003 is about 44.7548880012.
The cubic root of 2003 is about 12.6055069570.
The spelling of 2003 in words is "two thousand, three", and is thus an iban number.