131689 has 8 divisors (see below), whose sum is σ = 144000. Its totient is φ = 119952.

The previous prime is 131687. The next prime is 131701. The reversal of 131689 is 986131.

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 131689 - 2¹ = 131687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131687) 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, 432 + ... + 670.

It is an arithmetic number, because the mean of its divisors is an integer number (18000).

2¹³¹⁶⁸⁹ is an apocalyptic number.

131689 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

131689 is a deficient number, since it is larger than the sum of its proper divisors (12311).

131689 is a wasteful number, since it uses less digits than its factorization.

131689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287.

The product of its digits is 1296, while the sum is 28.

The square root of 131689 is about 362.8897904323. The cubic root of 131689 is about 50.8764148500.

It can be divided in two parts, 131 and 689, that added together give a triangular number (820 = T₄₀).

The spelling of 131689 in words is "one hundred thirty-one thousand, six hundred eighty-nine".