135543209 has 8 divisors (see below), whose sum is σ = 142457280. Its totient is φ = 128714256.

The previous prime is 135543203. The next prime is 135543229. The reversal of 135543209 is 902345531.

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

It is not a de Polignac number, because 135543209 - 2¹⁶ = 135477673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135543203) 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, 18002 + ... + 24395.

It is an arithmetic number, because the mean of its divisors is an integer number (17807160).

Almost surely, 2^135543209 is an apocalyptic number.

It is an amenable number.

135543209 is a deficient number, since it is larger than the sum of its proper divisors (6914071).

135543209 is a wasteful number, since it uses less digits than its factorization.

135543209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42559.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 135543209 is about 11642.3025643556. The cubic root of 135543209 is about 513.6799182568.

The spelling of 135543209 in words is "one hundred thirty-five million, five hundred forty-three thousand, two hundred nine".