131113187 has 4 divisors (see below), whose sum is σ = 131308680. Its totient is φ = 130917696.

The previous prime is 131113141. The next prime is 131113189. The reversal of 131113187 is 781311131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 781311131 = 229 ⋅3411839.

It is a cyclic number.

It is not a de Polignac number, because 131113187 - 2⁶ = 131113123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131113189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96737 + ... + 98082.

It is an arithmetic number, because the mean of its divisors is an integer number (32827170).

Almost surely, 2^131113187 is an apocalyptic number.

131113187 is a deficient number, since it is larger than the sum of its proper divisors (195493).

131113187 is an equidigital number, since it uses as much as digits as its factorization.

131113187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195492.

The product of its digits is 504, while the sum is 26.

The square root of 131113187 is about 11450.4666717126. The cubic root of 131113187 is about 508.0215376716.

The spelling of 131113187 in words is "one hundred thirty-one million, one hundred thirteen thousand, one hundred eighty-seven".