189689 has 8 divisors (see below), whose sum is σ = 203520. Its totient is φ = 176400.

The previous prime is 189671. The next prime is 189691. The reversal of 189689 is 986981.

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 189689 - 2⁸ = 189433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189619) 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, 794 + ... + 1004.

It is an arithmetic number, because the mean of its divisors is an integer number (25440).

2¹⁸⁹⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

189689 is a deficient number, since it is larger than the sum of its proper divisors (13831).

189689 is a wasteful number, since it uses less digits than its factorization.

189689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271.

The product of its digits is 31104, while the sum is 41.

The square root of 189689 is about 435.5330067859. The cubic root of 189689 is about 57.4575868704.

It can be divided in two parts, 189 and 689, that added together give a palindrome (878).

The spelling of 189689 in words is "one hundred eighty-nine thousand, six hundred eighty-nine".