5603 has 4 divisors (see below), whose sum is σ = 6048. Its totient is φ = 5160.

The previous prime is 5591. The next prime is 5623. The reversal of 5603 is 3065.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3065 = 5 ⋅613.

It is a cyclic number.

It is not a de Polignac number, because 5603 - 2⁸ = 5347 is a prime.

It is a Duffinian number.

It is a plaindrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (5623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203 + ... + 228.

It is an arithmetic number, because the mean of its divisors is an integer number (1512).

2⁵⁶⁰³ is an apocalyptic number.

5603 is a deficient number, since it is larger than the sum of its proper divisors (445).

5603 is a wasteful number, since it uses less digits than its factorization.

5603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444.

The product of its (nonzero) digits is 90, while the sum is 14.

The square root of 5603 is about 74.8531896448. The cubic root of 5603 is about 17.7612505545.

Adding to 5603 its reverse (3065), we get a palindrome (8668).

The spelling of 5603 in words is "five thousand, six hundred three".