135320013 has 6 divisors (see below), whose sum is σ = 195462254. Its totient is φ = 90213336.

The previous prime is 135319979. The next prime is 135320023. The reversal of 135320013 is 310023531.

It can be written as a sum of positive squares in only one way, i.e., 130576329 + 4743684 = 11427^2 + 2178^2 .

It is not a de Polignac number, because 135320013 - 2⁸ = 135319757 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 (135320023) 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 5 ways as a sum of consecutive naturals, for example, 7517770 + ... + 7517787.

Almost surely, 2^135320013 is an apocalyptic number.

It is an amenable number.

135320013 is a deficient number, since it is larger than the sum of its proper divisors (60142241).

135320013 is a wasteful number, since it uses less digits than its factorization.

135320013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15035563 (or 15035560 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 135320013 is about 11632.7130541418. The cubic root of 135320013 is about 513.3978082375.

Adding to 135320013 its reverse (310023531), we get a palindrome (445343544).

The spelling of 135320013 in words is "one hundred thirty-five million, three hundred twenty thousand, thirteen".