131361613 has 4 divisors (see below), whose sum is σ = 133840188. Its totient is φ = 128883040.

The previous prime is 131361557. The next prime is 131361617. The reversal of 131361613 is 316163131.

It is a happy number.

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 81757764 + 49603849 = 9042^2 + 7043^2 .

It is a cyclic number.

It is not a de Polignac number, because 131361613 - 2¹³ = 131353421 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 (131361617) 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, 1239208 + ... + 1239313.

It is an arithmetic number, because the mean of its divisors is an integer number (33460047).

Almost surely, 2^131361613 is an apocalyptic number.

It is an amenable number.

131361613 is a deficient number, since it is larger than the sum of its proper divisors (2478575).

131361613 is an equidigital number, since it uses as much as digits as its factorization.

131361613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2478574.

The product of its digits is 972, while the sum is 25.

The square root of 131361613 is about 11461.3093929097. The cubic root of 131361613 is about 508.3421922551.

It can be divided in two parts, 1313 and 61613, that added together give a palindrome (62926).

The spelling of 131361613 in words is "one hundred thirty-one million, three hundred sixty-one thousand, six hundred thirteen".