239889 has 8 divisors (see below), whose sum is σ = 344512. Its totient is φ = 147600.

The previous prime is 239879. The next prime is 239893. The reversal of 239889 is 988932.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 239889 - 2⁴ = 239873 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 6151 = 239889 / (2 + 3 + 9 + 8 + 8 + 9).

It is an Ulam number.

It is a Duffinian number.

239889 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (239849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3037 + ... + 3114.

It is an arithmetic number, because the mean of its divisors is an integer number (43064).

2²³⁹⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

239889 is a deficient number, since it is larger than the sum of its proper divisors (104623).

239889 is a wasteful number, since it uses less digits than its factorization.

239889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6167.

The product of its digits is 31104, while the sum is 39.

The square root of 239889 is about 489.7846465540. The cubic root of 239889 is about 62.1350680081.

It can be divided in two parts, 239 and 889, that added together give a triangular number (1128 = T₄₇).

The spelling of 239889 in words is "two hundred thirty-nine thousand, eight hundred eighty-nine".