135144309 has 4 divisors (see below), whose sum is σ = 180192416. Its totient is φ = 90096204.

The previous prime is 135144299. The next prime is 135144319. The reversal of 135144309 is 903441531.

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.

It is an interprime number because it is at equal distance from previous prime (135144299) and next prime (135144319).

It is not a de Polignac number, because 135144309 - 2⁵ = 135144277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135144319) 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, 22524049 + ... + 22524054.

It is an arithmetic number, because the mean of its divisors is an integer number (45048104).

Almost surely, 2^135144309 is an apocalyptic number.

It is an amenable number.

135144309 is a deficient number, since it is larger than the sum of its proper divisors (45048107).

135144309 is an equidigital number, since it uses as much as digits as its factorization.

135144309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45048106.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 135144309 is about 11625.1584505331. The cubic root of 135144309 is about 513.1755077394.

The spelling of 135144309 in words is "one hundred thirty-five million, one hundred forty-four thousand, three hundred nine".