131317385 has 4 divisors (see below), whose sum is σ = 157580868. Its totient is φ = 105053904.

The previous prime is 131317369. The next prime is 131317397. The reversal of 131317385 is 583713131.

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 75411856 + 55905529 = 8684^2 + 7477^2 .

It is a cyclic number.

It is not a de Polignac number, because 131317385 - 2⁴ = 131317369 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 13131734 + ... + 13131743.

It is an arithmetic number, because the mean of its divisors is an integer number (39395217).

Almost surely, 2^131317385 is an apocalyptic number.

It is an amenable number.

131317385 is a deficient number, since it is larger than the sum of its proper divisors (26263483).

131317385 is an equidigital number, since it uses as much as digits as its factorization.

131317385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26263482.

The product of its digits is 7560, while the sum is 32.

The square root of 131317385 is about 11459.3797825188. The cubic root of 131317385 is about 508.2851347893.

The spelling of 131317385 in words is "one hundred thirty-one million, three hundred seventeen thousand, three hundred eighty-five".