189687 has 8 divisors (see below), whose sum is σ = 257904. Its totient is φ = 123968.

The previous prime is 189671. The next prime is 189691. The reversal of 189687 is 786981.

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

It is a cyclic number.

It is not a de Polignac number, because 189687 - 2⁴ = 189671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 438 + ... + 755.

It is an arithmetic number, because the mean of its divisors is an integer number (32238).

2¹⁸⁹⁶⁸⁷ is an apocalyptic number.

189687 is a deficient number, since it is larger than the sum of its proper divisors (68217).

189687 is a wasteful number, since it uses less digits than its factorization.

189687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249.

The product of its digits is 24192, while the sum is 39.

The square root of 189687 is about 435.5307107427. The cubic root of 189687 is about 57.4573849336.

The spelling of 189687 in words is "one hundred eighty-nine thousand, six hundred eighty-seven".