131387668 has 12 divisors (see below), whose sum is σ = 232205652. Its totient is φ = 65043200.

The previous prime is 131387647. The next prime is 131387731. The reversal of 131387668 is 866783131.

131387668 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 64834704 + 66552964 = 8052^2 + 8158^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162205 + ... + 163012.

It is an arithmetic number, because the mean of its divisors is an integer number (19350471).

Almost surely, 2^131387668 is an apocalyptic number.

It is an amenable number.

131387668 is a deficient number, since it is larger than the sum of its proper divisors (100817984).

131387668 is a wasteful number, since it uses less digits than its factorization.

131387668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325322 (or 325320 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The square root of 131387668 is about 11462.4459867866. The cubic root of 131387668 is about 508.3757991816.

The spelling of 131387668 in words is "one hundred thirty-one million, three hundred eighty-seven thousand, six hundred sixty-eight".