239923 has 4 divisors (see below), whose sum is σ = 243040. Its totient is φ = 236808.

The previous prime is 239893. The next prime is 239929. The reversal of 239923 is 329932.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-239923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 239891 and 239900.

It is not an unprimeable number, because it can be changed into a prime (239929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1440 + ... + 1597.

It is an arithmetic number, because the mean of its divisors is an integer number (60760).

2²³⁹⁹²³ is an apocalyptic number.

239923 is a deficient number, since it is larger than the sum of its proper divisors (3117).

239923 is an equidigital number, since it uses as much as digits as its factorization.

239923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3116.

The product of its digits is 2916, while the sum is 28.

The square root of 239923 is about 489.8193544563. The cubic root of 239923 is about 62.1380033831.

Subtracting 239923 from its reverse (329932), we obtain a palindrome (90009).

The spelling of 239923 in words is "two hundred thirty-nine thousand, nine hundred twenty-three".