239663 has 4 divisors (see below), whose sum is σ = 240648. Its totient is φ = 238680.

The previous prime is 239641. The next prime is 239671. The reversal of 239663 is 366932.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 239663 - 2¹⁰ = 238639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (239623) 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, 173 + ... + 713.

It is an arithmetic number, because the mean of its divisors is an integer number (60162).

2²³⁹⁶⁶³ is an apocalyptic number.

239663 is a deficient number, since it is larger than the sum of its proper divisors (985).

239663 is an equidigital number, since it uses as much as digits as its factorization.

239663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984.

The product of its digits is 5832, while the sum is 29.

The square root of 239663 is about 489.5538785466. The cubic root of 239663 is about 62.1155493453.

The spelling of 239663 in words is "two hundred thirty-nine thousand, six hundred sixty-three".