189287 has 6 divisors (see below), whose sum is σ = 220248. Its totient is φ = 162204.

The previous prime is 189271. The next prime is 189307. The reversal of 189287 is 782981.

It is a happy number.

It is not a de Polignac number, because 189287 - 2⁴ = 189271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189257) 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 5 ways as a sum of consecutive naturals, for example, 1883 + ... + 1980.

It is an arithmetic number, because the mean of its divisors is an integer number (36708).

2¹⁸⁹²⁸⁷ is an apocalyptic number.

189287 is a deficient number, since it is larger than the sum of its proper divisors (30961).

189287 is an equidigital number, since it uses as much as digits as its factorization.

189287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3877 (or 3870 counting only the distinct ones).

The product of its digits is 8064, while the sum is 35.

The square root of 189287 is about 435.0712585313. The cubic root of 189287 is about 57.4169690064.

It can be divided in two parts, 18928 and 7, that multiplied together give a square (132496 = 364²).

The spelling of 189287 in words is "one hundred eighty-nine thousand, two hundred eighty-seven".