9923 has 2 divisors, whose sum is σ = 9924. Its totient is φ = 9922.

The previous prime is 9907. The next prime is 9929. The reversal of 9923 is 3299.

9923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (3299) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9923 - 2⁴ = 9907 is a prime.

It is a plaindrome in base 12 and base 14.

It is not a weakly prime, because it can be changed into another prime (9929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4961 + 4962.

It is an arithmetic number, because the mean of its divisors is an integer number (4962).

2⁹⁹²³ is an apocalyptic number.

9923 is a deficient number, since it is larger than the sum of its proper divisors (1).

9923 is an equidigital number, since it uses as much as digits as its factorization.

9923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 486, while the sum is 23.

The square root of 9923 is about 99.6142560079. The cubic root of 9923 is about 21.4889072036.

The spelling of 9923 in words is "nine thousand, nine hundred twenty-three".