13903 has 2 divisors, whose sum is σ = 13904. Its totient is φ = 13902.

The previous prime is 13901. The next prime is 13907. The reversal of 13903 is 30931.

It is a happy number.

13903 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 (30931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13903 - 2¹ = 13901 is a prime.

Together with 13901, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6951 + 6952.

It is an arithmetic number, because the mean of its divisors is an integer number (6952).

2¹³⁹⁰³ is an apocalyptic number.

13903 is a deficient number, since it is larger than the sum of its proper divisors (1).

13903 is an equidigital number, since it uses as much as digits as its factorization.

13903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81, while the sum is 16.

The square root of 13903 is about 117.9109833731. The cubic root of 13903 is about 24.0456307806.

The spelling of 13903 in words is "thirteen thousand, nine hundred three".