123189 has 8 divisors (see below), whose sum is σ = 179232. Its totient is φ = 74640.

The previous prime is 123169. The next prime is 123191. The reversal of 123189 is 981321.

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

It is not a de Polignac number, because 123189 - 2¹³ = 114997 is a prime.

123189 is a lucky number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123169) 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, 1834 + ... + 1899.

It is an arithmetic number, because the mean of its divisors is an integer number (22404).

2¹²³¹⁸⁹ is an apocalyptic number.

It is an amenable number.

123189 is a deficient number, since it is larger than the sum of its proper divisors (56043).

123189 is a wasteful number, since it uses less digits than its factorization.

123189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3747.

The product of its digits is 432, while the sum is 24.

The square root of 123189 is about 350.9829055666. The cubic root of 123189 is about 49.7573577327.

The spelling of 123189 in words is "one hundred twenty-three thousand, one hundred eighty-nine".