131918 has 8 divisors (see below), whose sum is σ = 200880. Its totient is φ = 64960.

The previous prime is 131909. The next prime is 131927. The reversal of 131918 is 819131.

It is an interprime number because it is at equal distance from previous prime (131909) and next prime (131927).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 131893 and 131902.

It is a congruent number.

It is an unprimeable number.

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, 323 + ... + 606.

It is an arithmetic number, because the mean of its divisors is an integer number (25110).

2¹³¹⁹¹⁸ is an apocalyptic number.

131918 is a deficient number, since it is larger than the sum of its proper divisors (68962).

131918 is an equidigital number, since it uses as much as digits as its factorization.

131918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002.

The product of its digits is 216, while the sum is 23.

The square root of 131918 is about 363.2051761746. The cubic root of 131918 is about 50.9058882107.

The spelling of 131918 in words is "one hundred thirty-one thousand, nine hundred eighteen".