2603 has 4 divisors (see below), whose sum is σ = 2760. Its totient is φ = 2448.

The previous prime is 2593. The next prime is 2609. The reversal of 2603 is 3062.

It is a happy number.

2603 is nontrivially palindromic in base 14.

2603 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3062 = 2 ⋅1531.

It is a cyclic number.

It is not a de Polignac number, because 2603 - 2⁶ = 2539 is a prime.

It is a Duffinian number.

2603 is an undulating number in base 14.

It is a nialpdrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 2603.

It is not an unprimeable number, because it can be changed into a prime (2609) 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, 50 + ... + 87.

It is an arithmetic number, because the mean of its divisors is an integer number (690).

2²⁶⁰³ is an apocalyptic number.

2603 is a deficient number, since it is larger than the sum of its proper divisors (157).

2603 is a wasteful number, since it uses less digits than its factorization.

2603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156.

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

The square root of 2603 is about 51.0196040753. The cubic root of 2603 is about 13.7559753643.

Adding to 2603 its reverse (3062), we get a palindrome (5665).

It can be divided in two parts, 260 and 3, that multiplied together give a triangular number (780 = T₃₉).

The spelling of 2603 in words is "two thousand, six hundred three".