136489 has 4 divisors (see below), whose sum is σ = 139860. Its totient is φ = 133120.

The previous prime is 136483. The next prime is 136501. The reversal of 136489 is 984631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 984631 = 127 ⋅7753.

It can be written as a sum of positive squares in 2 ways, for example, as 25600 + 110889 = 160^2 + 333^2 .

It is a cyclic number.

It is not a de Polignac number, because 136489 - 2³ = 136481 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 136489.

It is not an unprimeable number, because it can be changed into a prime (136481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1624 + ... + 1705.

It is an arithmetic number, because the mean of its divisors is an integer number (34965).

2¹³⁶⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

136489 is a deficient number, since it is larger than the sum of its proper divisors (3371).

136489 is an equidigital number, since it uses as much as digits as its factorization.

136489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3370.

The product of its digits is 5184, while the sum is 31.

The square root of 136489 is about 369.4441771093. Note that the first 3 decimals coincide. The cubic root of 136489 is about 51.4871932211.

It can be divided in two parts, 136 and 489, that added together give a 4-th power (625 = 5⁴).

The spelling of 136489 in words is "one hundred thirty-six thousand, four hundred eighty-nine".