136381613 has 4 divisors (see below), whose sum is σ = 137732028. Its totient is φ = 135031200.

The previous prime is 136381607. The next prime is 136381669. The reversal of 136381613 is 316183631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 131377444 + 5004169 = 11462^2 + 2237^2 .

It is a cyclic number.

It is not a de Polignac number, because 136381613 - 2⁶ = 136381549 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 136381613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136381673) 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, 675056 + ... + 675257.

It is an arithmetic number, because the mean of its divisors is an integer number (34433007).

Almost surely, 2^136381613 is an apocalyptic number.

It is an amenable number.

136381613 is a deficient number, since it is larger than the sum of its proper divisors (1350415).

136381613 is a wasteful number, since it uses less digits than its factorization.

136381613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350414.

The product of its digits is 7776, while the sum is 32.

The square root of 136381613 is about 11678.2538506405. The cubic root of 136381613 is about 514.7368662373.

It can be divided in two parts, 13638 and 1613, that added together give a palindrome (15251).

The spelling of 136381613 in words is "one hundred thirty-six million, three hundred eighty-one thousand, six hundred thirteen".