136289 has 4 divisors (see below), whose sum is σ = 144324. Its totient is φ = 128256.

The previous prime is 136277. The next prime is 136303. The reversal of 136289 is 982631.

136289 = T₇₂ + T₇₃ + ... + T₁₀₅.

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

It can be written as a sum of positive squares in 2 ways, for example, as 93025 + 43264 = 305^2 + 208^2 .

It is a cyclic number.

It is not a de Polignac number, because 136289 - 2⁴ = 136273 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3992 + ... + 4025.

It is an arithmetic number, because the mean of its divisors is an integer number (36081).

2¹³⁶²⁸⁹ is an apocalyptic number.

It is an amenable number.

136289 is a deficient number, since it is larger than the sum of its proper divisors (8035).

136289 is an equidigital number, since it uses as much as digits as its factorization.

136289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8034.

The product of its digits is 2592, while the sum is 29.

The square root of 136289 is about 369.1734009920. The cubic root of 136289 is about 51.4620325307.

It can be divided in two parts, 136 and 289, that multiplied together give a cube (39304 = 34³).

The spelling of 136289 in words is "one hundred thirty-six thousand, two hundred eighty-nine".