239869 has 4 divisors (see below), whose sum is σ = 274144. Its totient is φ = 205596.

The previous prime is 239857. The next prime is 239873. The reversal of 239869 is 968932.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 239869 - 2⁹ = 239357 is a prime.

It is a super-2 number, since 2×239869² = 115074274322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 17127 + ... + 17140.

It is an arithmetic number, because the mean of its divisors is an integer number (68536).

2²³⁹⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

239869 is a deficient number, since it is larger than the sum of its proper divisors (34275).

239869 is an equidigital number, since it uses as much as digits as its factorization.

239869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34274.

The product of its digits is 23328, while the sum is 37.

The square root of 239869 is about 489.7642289919. The cubic root of 239869 is about 62.1333411874.

The spelling of 239869 in words is "two hundred thirty-nine thousand, eight hundred sixty-nine".