135873613 has 8 divisors (see below), whose sum is σ = 141017400. Its totient is φ = 130760448.

The previous prime is 135873599. The next prime is 135873641. The reversal of 135873613 is 316378531.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13704804 + 122168809 = 3702^2 + 11053^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135873613 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 (135873643) 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, 1593 + ... + 16561.

It is an arithmetic number, because the mean of its divisors is an integer number (17627175).

Almost surely, 2^135873613 is an apocalyptic number.

It is an amenable number.

135873613 is a deficient number, since it is larger than the sum of its proper divisors (5143787).

135873613 is a wasteful number, since it uses less digits than its factorization.

135873613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15311.

The product of its digits is 45360, while the sum is 37.

The square root of 135873613 is about 11656.4837322410. The cubic root of 135873613 is about 514.0969665203.

The spelling of 135873613 in words is "one hundred thirty-five million, eight hundred seventy-three thousand, six hundred thirteen".