131134687 has 4 divisors (see below), whose sum is σ = 134333136. Its totient is φ = 127936240.

The previous prime is 131134643. The next prime is 131134691. The reversal of 131134687 is 786431131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131134687 is a prime.

It is a super-2 number, since 2×131134687² = 34392612269175938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131134187) 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, 1599163 + ... + 1599244.

It is an arithmetic number, because the mean of its divisors is an integer number (33583284).

Almost surely, 2^131134687 is an apocalyptic number.

131134687 is a deficient number, since it is larger than the sum of its proper divisors (3198449).

131134687 is an equidigital number, since it uses as much as digits as its factorization.

131134687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3198448.

The product of its digits is 12096, while the sum is 34.

The square root of 131134687 is about 11451.4054595932. The cubic root of 131134687 is about 508.0493046881.

The spelling of 131134687 in words is "one hundred thirty-one million, one hundred thirty-four thousand, six hundred eighty-seven".