189039 has 8 divisors (see below), whose sum is σ = 256432. Its totient is φ = 123840.

The previous prime is 189019. The next prime is 189041. The reversal of 189039 is 930981.

It is a happy number.

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

It is not a de Polignac number, because 189039 - 2⁷ = 188911 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 188997 and 189015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 334 + ... + 699.

It is an arithmetic number, because the mean of its divisors is an integer number (32054).

2¹⁸⁹⁰³⁹ is an apocalyptic number.

189039 is a deficient number, since it is larger than the sum of its proper divisors (67393).

189039 is a wasteful number, since it uses less digits than its factorization.

189039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 189039 is about 434.7861543334. The cubic root of 189039 is about 57.3918825300.

The spelling of 189039 in words is "one hundred eighty-nine thousand, thirty-nine".