136689 has 16 divisors (see below), whose sum is σ = 218112. Its totient is φ = 74448.

The previous prime is 136657. The next prime is 136691. The reversal of 136689 is 986631.

136689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 136689 - 2⁵ = 136657 is a prime.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (136649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342 + ... + 624.

It is an arithmetic number, because the mean of its divisors is an integer number (13632).

2¹³⁶⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

136689 is a deficient number, since it is larger than the sum of its proper divisors (81423).

136689 is a wasteful number, since it uses less digits than its factorization.

136689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316.

The product of its digits is 7776, while the sum is 33.

The square root of 136689 is about 369.7147549125. The cubic root of 136689 is about 51.5123293445.

The spelling of 136689 in words is "one hundred thirty-six thousand, six hundred eighty-nine".