239966 has 4 divisors (see below), whose sum is σ = 359952. Its totient is φ = 119982.

The previous prime is 239963. The next prime is 239977. The reversal of 239966 is 669932.

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 239966.

It is not an unprimeable number, because it can be changed into a prime (239963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59990 + ... + 59993.

It is an arithmetic number, because the mean of its divisors is an integer number (89988).

2²³⁹⁹⁶⁶ is an apocalyptic number.

239966 is a deficient number, since it is larger than the sum of its proper divisors (119986).

239966 is a wasteful number, since it uses less digits than its factorization.

239966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119985.

The product of its digits is 17496, while the sum is 35.

The square root of 239966 is about 489.8632462229. The cubic root of 239966 is about 62.1417153720.

The spelling of 239966 in words is "two hundred thirty-nine thousand, nine hundred sixty-six".