189659 has 4 divisors (see below), whose sum is σ = 191880. Its totient is φ = 187440.

The previous prime is 189653. The next prime is 189661. The reversal of 189659 is 956981.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 189659 - 2⁴ = 189643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189653) 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 3 ways as a sum of consecutive naturals, for example, 977 + ... + 1154.

It is an arithmetic number, because the mean of its divisors is an integer number (47970).

2¹⁸⁹⁶⁵⁹ is an apocalyptic number.

189659 is a deficient number, since it is larger than the sum of its proper divisors (2221).

189659 is an equidigital number, since it uses as much as digits as its factorization.

189659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2220.

The product of its digits is 19440, while the sum is 38.

The square root of 189659 is about 435.4985648656. The cubic root of 189659 is about 57.4545576691.

It can be divided in two parts, 189 and 659, that added together give a palindrome (848).

The spelling of 189659 in words is "one hundred eighty-nine thousand, six hundred fifty-nine".