223889 has 4 divisors (see below), whose sum is σ = 225060. Its totient is φ = 222720.

The previous prime is 223849. The next prime is 223903. The reversal of 223889 is 988322.

It is a happy number.

223889 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 + 153664 = 265^2 + 392^2 .

It is a cyclic number.

It is not a de Polignac number, because 223889 - 2⁸ = 223633 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 10.

It is a nialpdrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223829) 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, 224 + ... + 705.

It is an arithmetic number, because the mean of its divisors is an integer number (56265).

2²²³⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

223889 is a deficient number, since it is larger than the sum of its proper divisors (1171).

223889 is an equidigital number, since it uses as much as digits as its factorization.

223889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170.

The product of its digits is 6912, while the sum is 32.

The square root of 223889 is about 473.1691029643. The cubic root of 223889 is about 60.7217461915.

It can be divided in two parts, 22 and 3889, that multiplied together give a palindrome (85558).

The spelling of 223889 in words is "two hundred twenty-three thousand, eight hundred eighty-nine".