131485637 has 4 divisors (see below), whose sum is σ = 131621196. Its totient is φ = 131350080.

The previous prime is 131485631. The next prime is 131485639. The reversal of 131485637 is 736584131.

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 126472516 + 5013121 = 11246^2 + 2239^2 .

It is a cyclic number.

It is not a de Polignac number, because 131485637 - 2⁴ = 131485621 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 131485637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131485631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66314 + ... + 68267.

It is an arithmetic number, because the mean of its divisors is an integer number (32905299).

Almost surely, 2^131485637 is an apocalyptic number.

It is an amenable number.

131485637 is a deficient number, since it is larger than the sum of its proper divisors (135559).

131485637 is an equidigital number, since it uses as much as digits as its factorization.

131485637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135558.

The product of its digits is 60480, while the sum is 38.

The square root of 131485637 is about 11466.7186675177. The cubic root of 131485637 is about 508.5021243168.

The spelling of 131485637 in words is "one hundred thirty-one million, four hundred eighty-five thousand, six hundred thirty-seven".