135244013 has 4 divisors (see below), whose sum is σ = 135365568. Its totient is φ = 135122460.

The previous prime is 135244001. The next prime is 135244063. The reversal of 135244013 is 310442531.

135244013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 135244013 - 2¹² = 135239917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135244013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135244063) 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, 59093 + ... + 61338.

It is an arithmetic number, because the mean of its divisors is an integer number (33841392).

Almost surely, 2^135244013 is an apocalyptic number.

It is an amenable number.

135244013 is a deficient number, since it is larger than the sum of its proper divisors (121555).

135244013 is a wasteful number, since it uses less digits than its factorization.

135244013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121554.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 135244013 is about 11629.4459455298. The cubic root of 135244013 is about 513.3016767551.

Adding to 135244013 its reverse (310442531), we get a palindrome (445686544).

The spelling of 135244013 in words is "one hundred thirty-five million, two hundred forty-four thousand, thirteen".