189943 has 8 divisors (see below), whose sum is σ = 215600. Its totient is φ = 165888.

The previous prime is 189929. The next prime is 189947. The reversal of 189943 is 349981.

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

It is a 11-Lehmer number, since φ(189943) divides (189943-1)¹¹.

It is a cyclic number.

It is not a de Polignac number, because 189943 - 2¹³ = 181751 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 189899 and 189908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138 + ... + 631.

It is an arithmetic number, because the mean of its divisors is an integer number (26950).

2¹⁸⁹⁹⁴³ is an apocalyptic number.

189943 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

189943 is a deficient number, since it is larger than the sum of its proper divisors (25657).

189943 is a wasteful number, since it uses less digits than its factorization.

189943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801.

The product of its digits is 7776, while the sum is 34.

The square root of 189943 is about 435.8245059654. The cubic root of 189943 is about 57.4832213174.

The spelling of 189943 in words is "one hundred eighty-nine thousand, nine hundred forty-three".