189839 has 8 divisors (see below), whose sum is σ = 216720. Its totient is φ = 164736.

The previous prime is 189823. The next prime is 189851. The reversal of 189839 is 938981.

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

It is not a de Polignac number, because 189839 - 2⁴ = 189823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189859) 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, 209 + ... + 650.

It is an arithmetic number, because the mean of its divisors is an integer number (27090).

2¹⁸⁹⁸³⁹ is an apocalyptic number.

189839 is a deficient number, since it is larger than the sum of its proper divisors (26881).

189839 is a wasteful number, since it uses less digits than its factorization.

189839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889.

The product of its digits is 15552, while the sum is 38.

The square root of 189839 is about 435.7051755488. The cubic root of 189839 is about 57.4727280879.

The spelling of 189839 in words is "one hundred eighty-nine thousand, eight hundred thirty-nine".