11503 has 2 divisors, whose sum is σ = 11504. Its totient is φ = 11502.

The previous prime is 11497. The next prime is 11519. The reversal of 11503 is 30511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11503 - 2⁵ = 11471 is a prime.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 11503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5751 + 5752.

It is an arithmetic number, because the mean of its divisors is an integer number (5752).

2¹¹⁵⁰³ is an apocalyptic number.

11503 is a deficient number, since it is larger than the sum of its proper divisors (1).

11503 is an equidigital number, since it uses as much as digits as its factorization.

11503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15, while the sum is 10.

The square root of 11503 is about 107.2520396076. The cubic root of 11503 is about 22.5737497708.

The spelling of 11503 in words is "eleven thousand, five hundred three".