131349613 has 4 divisors (see below), whose sum is σ = 135878940. Its totient is φ = 126820288.

The previous prime is 131349611. The next prime is 131349629. The reversal of 131349613 is 316943131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 316943131 = 1471 ⋅215461.

It can be written as a sum of positive squares in 2 ways, for example, as 60419529 + 70930084 = 7773^2 + 8422^2 .

It is a cyclic number.

It is not a de Polignac number, because 131349613 - 2¹ = 131349611 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 (131349611) 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, 2264620 + ... + 2264677.

It is an arithmetic number, because the mean of its divisors is an integer number (33969735).

Almost surely, 2^131349613 is an apocalyptic number.

It is an amenable number.

131349613 is a deficient number, since it is larger than the sum of its proper divisors (4529327).

131349613 is an equidigital number, since it uses as much as digits as its factorization.

131349613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4529326.

The product of its digits is 5832, while the sum is 31.

The square root of 131349613 is about 11460.7858805581. The cubic root of 131349613 is about 508.3267126135.

The spelling of 131349613 in words is "one hundred thirty-one million, three hundred forty-nine thousand, six hundred thirteen".