230689 has 4 divisors (see below), whose sum is σ = 231700. Its totient is φ = 229680.

The previous prime is 230683. The next prime is 230693. The reversal of 230689 is 986032.

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 176400 + 54289 = 420^2 + 233^2 .

It is a cyclic number.

It is not a de Polignac number, because 230689 - 2⁷ = 230561 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (230683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19 + ... + 679.

It is an arithmetic number, because the mean of its divisors is an integer number (57925).

2²³⁰⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

230689 is a deficient number, since it is larger than the sum of its proper divisors (1011).

230689 is an equidigital number, since it uses as much as digits as its factorization.

230689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 230689 is about 480.3009473237. The cubic root of 230689 is about 61.3303762227.

It can be divided in two parts, 230 and 689, that added together give a palindrome (919).

The spelling of 230689 in words is "two hundred thirty thousand, six hundred eighty-nine".