11003 has 2 divisors, whose sum is σ = 11004. Its totient is φ = 11002.

The previous prime is 10993. The next prime is 11027. The reversal of 11003 is 30011.

11003 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (30011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11003 - 2⁴ = 10987 is a prime.

It is not a weakly prime, because it can be changed into another prime (11083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5501 + 5502.

It is an arithmetic number, because the mean of its divisors is an integer number (5502).

2¹¹⁰⁰³ is an apocalyptic number.

11003 is a deficient number, since it is larger than the sum of its proper divisors (1).

11003 is an equidigital number, since it uses as much as digits as its factorization.

11003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3, while the sum is 5.

The square root of 11003 is about 104.8951857809. The cubic root of 11003 is about 22.2418225220.

Adding to 11003 its reverse (30011), we get a palindrome (41014).

The spelling of 11003 in words is "eleven thousand, three", and thus it is an iban number.