131117 has 4 divisors (see below), whose sum is σ = 149856. Its totient is φ = 112380.

The previous prime is 131113. The next prime is 131129. The reversal of 131117 is 711131.

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 131117 - 2² = 131113 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131111) 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, 9359 + ... + 9372.

It is an arithmetic number, because the mean of its divisors is an integer number (37464).

2¹³¹¹¹⁷ is an apocalyptic number.

It is an amenable number.

131117 is a deficient number, since it is larger than the sum of its proper divisors (18739).

131117 is an equidigital number, since it uses as much as digits as its factorization.

131117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18738.

The product of its digits is 21, while the sum is 14.

The square root of 131117 is about 362.1008146912. The cubic root of 131117 is about 50.8026462341.

Adding to 131117 its sum of digits (14), we get a palindrome (131131).

Adding to 131117 its reverse (711131), we get a palindrome (842248).

The spelling of 131117 in words is "one hundred thirty-one thousand, one hundred seventeen".