135805289 has 8 divisors (see below), whose sum is σ = 140866560. Its totient is φ = 130769296.

The previous prime is 135805283. The next prime is 135805301. The reversal of 135805289 is 982508531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135805289 - 2⁴ = 135805273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135805283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4994 + ... + 17220.

It is an arithmetic number, because the mean of its divisors is an integer number (17608320).

Almost surely, 2^135805289 is an apocalyptic number.

It is an amenable number.

135805289 is a deficient number, since it is larger than the sum of its proper divisors (5061271).

135805289 is a wasteful number, since it uses less digits than its factorization.

135805289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12639.

The product of its (nonzero) digits is 86400, while the sum is 41.

The square root of 135805289 is about 11653.5526342828. The cubic root of 135805289 is about 514.0107809111.

The spelling of 135805289 in words is "one hundred thirty-five million, eight hundred five thousand, two hundred eighty-nine".