135839289 has 4 divisors (see below), whose sum is σ = 181119056. Its totient is φ = 90559524.

The previous prime is 135839281. The next prime is 135839293. The reversal of 135839289 is 982938531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 982938531 = 3 ⋅327646177.

It is not a de Polignac number, because 135839289 - 2³ = 135839281 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (135839281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22639879 + ... + 22639884.

It is an arithmetic number, because the mean of its divisors is an integer number (45279764).

Almost surely, 2^135839289 is an apocalyptic number.

It is an amenable number.

135839289 is a deficient number, since it is larger than the sum of its proper divisors (45279767).

135839289 is an equidigital number, since it uses as much as digits as its factorization.

135839289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45279766.

The product of its digits is 466560, while the sum is 48.

The square root of 135839289 is about 11655.0113256058. The cubic root of 135839289 is about 514.0536729772.

The spelling of 135839289 in words is "one hundred thirty-five million, eight hundred thirty-nine thousand, two hundred eighty-nine".