189387 has 12 divisors (see below), whose sum is σ = 298584. Its totient is φ = 114720.

The previous prime is 189377. The next prime is 189389. The reversal of 189387 is 783981.

It is not a de Polignac number, because 189387 - 2¹¹ = 187339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (189389) 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 11 ways as a sum of consecutive naturals, for example, 858 + ... + 1055.

It is an arithmetic number, because the mean of its divisors is an integer number (24882).

2¹⁸⁹³⁸⁷ is an apocalyptic number.

189387 is a deficient number, since it is larger than the sum of its proper divisors (109197).

189387 is a wasteful number, since it uses less digits than its factorization.

189387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1930 (or 1927 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 189387 is about 435.1861670596. The cubic root of 189387 is about 57.4270783220.

It can be divided in two parts, 189 and 387, that added together give a square (576 = 24²).

The spelling of 189387 in words is "one hundred eighty-nine thousand, three hundred eighty-seven".