136842289 has 4 divisors (see below), whose sum is σ = 137158756. Its totient is φ = 136525824.

The previous prime is 136842283. The next prime is 136842331. The reversal of 136842289 is 982248631.

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 44355600 + 92486689 = 6660^2 + 9617^2 .

It is a cyclic number.

It is not a de Polignac number, because 136842289 - 2³ = 136842281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136842281) 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, 157584 + ... + 158449.

It is an arithmetic number, because the mean of its divisors is an integer number (34289689).

Almost surely, 2^136842289 is an apocalyptic number.

It is an amenable number.

136842289 is a deficient number, since it is larger than the sum of its proper divisors (316467).

136842289 is an equidigital number, since it uses as much as digits as its factorization.

136842289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316466.

The product of its digits is 165888, while the sum is 43.

The square root of 136842289 is about 11697.9608906852. The cubic root of 136842289 is about 515.3157820765.

The spelling of 136842289 in words is "one hundred thirty-six million, eight hundred forty-two thousand, two hundred eighty-nine".