223989 has 8 divisors (see below), whose sum is σ = 300960. Its totient is φ = 148176.

The previous prime is 223969. The next prime is 223999. The reversal of 223989 is 989322.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 223989 - 2¹¹ = 221941 is a prime.

It is a d-powerful number, because it can be written as 2⁷ + 2¹⁷ + 9³ + 3⁵ + 8⁵ + 9⁵ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 402 + ... + 780.

It is an arithmetic number, because the mean of its divisors is an integer number (37620).

2²²³⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

223989 is a deficient number, since it is larger than the sum of its proper divisors (76971).

223989 is a wasteful number, since it uses less digits than its factorization.

223989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579.

The product of its digits is 7776, while the sum is 33.

The square root of 223989 is about 473.2747616343. The cubic root of 223989 is about 60.7307852999.

The spelling of 223989 in words is "two hundred twenty-three thousand, nine hundred eighty-nine".