135456209 has 8 divisors (see below), whose sum is σ = 158101248. Its totient is φ = 113634720.

The previous prime is 135456203. The next prime is 135456239. The reversal of 135456209 is 902654531.

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

It is not a de Polignac number, because 135456209 - 2⁴ = 135456193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135456203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205532 + ... + 206189.

It is an arithmetic number, because the mean of its divisors is an integer number (19762656).

Almost surely, 2^135456209 is an apocalyptic number.

It is an amenable number.

135456209 is a deficient number, since it is larger than the sum of its proper divisors (22645039).

135456209 is an equidigital number, since it uses as much as digits as its factorization.

135456209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411775.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 135456209 is about 11638.5655903122. The cubic root of 135456209 is about 513.5699909053.

The spelling of 135456209 in words is "one hundred thirty-five million, four hundred fifty-six thousand, two hundred nine".