23903 has 8 divisors (see below), whose sum is σ = 27216.
Its totient is φ = 20800.
The previous prime is 23899. The next prime is 23909. The reversal of 23903 is 30932.
Multipling 23903 by its sum of digits (17), we get a triangular number (406351 = T901).
It is a happy number.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 23903 - 22 = 23899 is a prime.
It is a Duffinian number.
It is a plaindrome in base 12.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (23909) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 425 + ... + 477.
It is an arithmetic number, because the mean of its divisors is an integer number (3402).
223903 is an apocalyptic number.
23903 is a deficient number, since it is larger than the sum of its proper divisors (3313).
23903 is a wasteful number, since it uses less digits than its factorization.
23903 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 105.
The product of its (nonzero) digits is 162, while the sum is 17.
The square root of 23903 is about 154.6059507264.
The cubic root of 23903 is about 28.8060783210.
The spelling of 23903 in words is "twenty-three thousand, nine hundred three".