189129 has 8 divisors (see below), whose sum is σ = 263232. Its totient is φ = 120560.

The previous prime is 189127. The next prime is 189139. The reversal of 189129 is 921981.

189129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 189129 - 2¹ = 189127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 189096 and 189105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189127) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1302 + ... + 1439.

It is an arithmetic number, because the mean of its divisors is an integer number (32904).

2¹⁸⁹¹²⁹ is an apocalyptic number.

It is an amenable number.

189129 is a deficient number, since it is larger than the sum of its proper divisors (74103).

189129 is a wasteful number, since it uses less digits than its factorization.

189129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2767.

The product of its digits is 1296, while the sum is 30.

The square root of 189129 is about 434.8896411735. The cubic root of 189129 is about 57.4009890282.

The spelling of 189129 in words is "one hundred eighty-nine thousand, one hundred twenty-nine".