131423 has 4 divisors (see below), whose sum is σ = 138360. Its totient is φ = 124488.

The previous prime is 131413. The next prime is 131431. The reversal of 131423 is 324131.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 131423 - 2¹⁰ = 130399 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131398 and 131407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3440 + ... + 3477.

It is an arithmetic number, because the mean of its divisors is an integer number (34590).

2¹³¹⁴²³ is an apocalyptic number.

131423 is a deficient number, since it is larger than the sum of its proper divisors (6937).

131423 is an equidigital number, since it uses as much as digits as its factorization.

131423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6936.

The product of its digits is 72, while the sum is 14.

The square root of 131423 is about 362.5231027121. The cubic root of 131423 is about 50.8421364909.

Adding to 131423 its reverse (324131), we get a palindrome (455554).

The spelling of 131423 in words is "one hundred thirty-one thousand, four hundred twenty-three".