131384681 has 4 divisors (see below), whose sum is σ = 133611600. Its totient is φ = 129157764.

The previous prime is 131384611. The next prime is 131384689. The reversal of 131384681 is 186483131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131384681 is a prime.

It is a super-2 number, since 2×131384681² = 34523868802943522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131384689) 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, 1113371 + ... + 1113488.

It is an arithmetic number, because the mean of its divisors is an integer number (33402900).

Almost surely, 2^131384681 is an apocalyptic number.

It is an amenable number.

131384681 is a deficient number, since it is larger than the sum of its proper divisors (2226919).

131384681 is an equidigital number, since it uses as much as digits as its factorization.

131384681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2226918.

The product of its digits is 13824, while the sum is 35.

The square root of 131384681 is about 11462.3156909937. The cubic root of 131384681 is about 508.3719466383.

The spelling of 131384681 in words is "one hundred thirty-one million, three hundred eighty-four thousand, six hundred eighty-one".