689239 has 4 divisors (see below), whose sum is σ = 700600. Its totient is φ = 677880.

The previous prime is 689237. The next prime is 689257. The reversal of 689239 is 932986.

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 689239 - 2¹ = 689237 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 689198 and 689207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689233) 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, 5589 + ... + 5710.

It is an arithmetic number, because the mean of its divisors is an integer number (175150).

2⁶⁸⁹²³⁹ is an apocalyptic number.

689239 is a deficient number, since it is larger than the sum of its proper divisors (11361).

689239 is a wasteful number, since it uses less digits than its factorization.

689239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11360.

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

The square root of 689239 is about 830.2041917504. The cubic root of 689239 is about 88.3330611914. Note that the first 3 decimals are identical.

The spelling of 689239 in words is "six hundred eighty-nine thousand, two hundred thirty-nine".