131343985 has 4 divisors (see below), whose sum is σ = 157612788. Its totient is φ = 105075184.

The previous prime is 131343983. The next prime is 131344013. The reversal of 131343985 is 589343131.

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 60093504 + 71250481 = 7752^2 + 8441^2 .

It is a cyclic number.

It is not a de Polignac number, because 131343985 - 2¹ = 131343983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131343983) 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, 13134394 + ... + 13134403.

It is an arithmetic number, because the mean of its divisors is an integer number (39403197).

Almost surely, 2^131343985 is an apocalyptic number.

It is an amenable number.

131343985 is a deficient number, since it is larger than the sum of its proper divisors (26268803).

131343985 is an equidigital number, since it uses as much as digits as its factorization.

131343985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26268802.

The product of its digits is 38880, while the sum is 37.

The square root of 131343985 is about 11460.5403450274. The cubic root of 131343985 is about 508.3194523368.

The spelling of 131343985 in words is "one hundred thirty-one million, three hundred forty-three thousand, nine hundred eighty-five".