17923 has 2 divisors, whose sum is σ = 17924. Its totient is φ = 17922.

The previous prime is 17921. The next prime is 17929. The reversal of 17923 is 32971.

It is a weak prime.

It is an emirp because it is prime and its reverse (32971) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 17923 - 2¹ = 17921 is a prime.

Together with 17921, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 17894 and 17903.

It is not a weakly prime, because it can be changed into another prime (17921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8961 + 8962.

It is an arithmetic number, because the mean of its divisors is an integer number (8962).

2¹⁷⁹²³ is an apocalyptic number.

17923 is a deficient number, since it is larger than the sum of its proper divisors (1).

17923 is an equidigital number, since it uses as much as digits as its factorization.

17923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 378, while the sum is 22.

The square root of 17923 is about 133.8768090447. The cubic root of 17923 is about 26.1699906975.

It can be divided in two parts, 179 and 23, that added together give a palindrome (202).

The spelling of 17923 in words is "seventeen thousand, nine hundred twenty-three".