131887 has 8 divisors (see below), whose sum is σ = 153216. Its totient is φ = 111192.

The previous prime is 131861. The next prime is 131891. The reversal of 131887 is 788131.

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 131887 - 2⁷ = 131759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 468 + ... + 694.

It is an arithmetic number, because the mean of its divisors is an integer number (19152).

2¹³¹⁸⁸⁷ is an apocalyptic number.

131887 is a deficient number, since it is larger than the sum of its proper divisors (21329).

131887 is an equidigital number, since it uses as much as digits as its factorization.

131887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317.

The product of its digits is 1344, while the sum is 28.

The square root of 131887 is about 363.1624980639. The cubic root of 131887 is about 50.9019003643.

It can be divided in two parts, 13 and 1887, that multiplied together give a triangular number (24531 = T₂₂₁).

The spelling of 131887 in words is "one hundred thirty-one thousand, eight hundred eighty-seven".