131608637 has 4 divisors (see below), whose sum is σ = 131981820. Its totient is φ = 131235456.

The previous prime is 131608627. The next prime is 131608651. The reversal of 131608637 is 736806131.

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 103103716 + 28504921 = 10154^2 + 5339^2 .

It is a cyclic number.

It is not a de Polignac number, because 131608637 - 2¹⁰ = 131607613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131608597 and 131608606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131608627) 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, 186062 + ... + 186767.

It is an arithmetic number, because the mean of its divisors is an integer number (32995455).

Almost surely, 2^131608637 is an apocalyptic number.

It is an amenable number.

131608637 is a deficient number, since it is larger than the sum of its proper divisors (373183).

131608637 is an equidigital number, since it uses as much as digits as its factorization.

131608637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373182.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 131608637 is about 11472.0807615707. The cubic root of 131608637 is about 508.6606366069.

The spelling of 131608637 in words is "one hundred thirty-one million, six hundred eight thousand, six hundred thirty-seven".