131389 has 4 divisors (see below), whose sum is σ = 133056. Its totient is φ = 129724.

The previous prime is 131381. The next prime is 131413. The reversal of 131389 is 983131.

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 not a de Polignac number, because 131389 - 2³ = 131381 is a prime.

It is a Duffinian number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 709 + ... + 874.

It is an arithmetic number, because the mean of its divisors is an integer number (33264).

2¹³¹³⁸⁹ is an apocalyptic number.

It is an amenable number.

131389 is a deficient number, since it is larger than the sum of its proper divisors (1667).

131389 is an equidigital number, since it uses as much as digits as its factorization.

131389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666.

The product of its digits is 648, while the sum is 25.

The square root of 131389 is about 362.4762061157. The cubic root of 131389 is about 50.8377517137.

The spelling of 131389 in words is "one hundred thirty-one thousand, three hundred eighty-nine".