131387 has 8 divisors (see below), whose sum is σ = 139536. Its totient is φ = 123552.

The previous prime is 131381. The next prime is 131413. The reversal of 131387 is 783131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131387 - 2⁴ = 131371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1928 + ... + 1994.

It is an arithmetic number, because the mean of its divisors is an integer number (17442).

2¹³¹³⁸⁷ is an apocalyptic number.

131387 is a deficient number, since it is larger than the sum of its proper divisors (8149).

131387 is an equidigital number, since it uses as much as digits as its factorization.

131387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157.

The product of its digits is 504, while the sum is 23.

The square root of 131387 is about 362.4734473034. The cubic root of 131387 is about 50.8374937620.

The spelling of 131387 in words is "one hundred thirty-one thousand, three hundred eighty-seven".