239863 has 4 divisors (see below), whose sum is σ = 258328. Its totient is φ = 221400.

The previous prime is 239857. The next prime is 239873. The reversal of 239863 is 368932.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 239863 - 2⁵ = 239831 is a prime.

It is a super-3 number, since 3×239863³ = 41401019733325941, which contains 333 as substring.

It is a Duffinian number.

239863 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (239803) 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, 9213 + ... + 9238.

It is an arithmetic number, because the mean of its divisors is an integer number (64582).

2²³⁹⁸⁶³ is an apocalyptic number.

239863 is a deficient number, since it is larger than the sum of its proper divisors (18465).

239863 is a wasteful number, since it uses less digits than its factorization.

239863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18464.

The product of its digits is 7776, while the sum is 31.

The square root of 239863 is about 489.7581035573. The cubic root of 239863 is about 62.1328231225.

The spelling of 239863 in words is "two hundred thirty-nine thousand, eight hundred sixty-three".