239969 has 4 divisors (see below), whose sum is σ = 241044. Its totient is φ = 238896.

The previous prime is 239963. The next prime is 239977. The reversal of 239969 is 969932.

239969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 can be written as a sum of positive squares in 2 ways, for example, as 70225 + 169744 = 265^2 + 412^2 .

It is a cyclic number.

It is not a de Polignac number, because 239969 - 2⁸ = 239713 is a prime.

It is a super-2 number, since 2×239969² = 115170241922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 239969.

It is not an unprimeable number, because it can be changed into a prime (239963) 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, 62 + ... + 695.

It is an arithmetic number, because the mean of its divisors is an integer number (60261).

2²³⁹⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

239969 is a deficient number, since it is larger than the sum of its proper divisors (1075).

239969 is an equidigital number, since it uses as much as digits as its factorization.

239969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074.

The product of its digits is 26244, while the sum is 38.

The square root of 239969 is about 489.8663082924. The cubic root of 239969 is about 62.1419743314.

The spelling of 239969 in words is "two hundred thirty-nine thousand, nine hundred sixty-nine".