131349 has 4 divisors (see below), whose sum is σ = 175136. Its totient is φ = 87564.

The previous prime is 131321. The next prime is 131357. The reversal of 131349 is 943131.

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 not a de Polignac number, because 131349 - 2⁵ = 131317 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21889 + ... + 21894.

It is an arithmetic number, because the mean of its divisors is an integer number (43784).

2¹³¹³⁴⁹ is an apocalyptic number.

It is an amenable number.

131349 is a deficient number, since it is larger than the sum of its proper divisors (43787).

131349 is an equidigital number, since it uses as much as digits as its factorization.

131349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43786.

The product of its digits is 324, while the sum is 21.

The square root of 131349 is about 362.4210258801. The cubic root of 131349 is about 50.8325921836.

Subtracting from 131349 its sum of digits (21), we obtain a triangular number (131328 = T₅₁₂).

The spelling of 131349 in words is "one hundred thirty-one thousand, three hundred forty-nine".