131317887 has 16 divisors (see below), whose sum is σ = 182448000. Its totient is φ = 83910624.

The previous prime is 131317841. The next prime is 131317889. The reversal of 131317887 is 788713131.

It is not a de Polignac number, because 131317887 - 2²⁰ = 130269311 is a prime.

It is a super-2 number, since 2×131317887² = 34488774892289538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131317889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6664 + ... + 17522.

It is an arithmetic number, because the mean of its divisors is an integer number (11403000).

Almost surely, 2^131317887 is an apocalyptic number.

131317887 is a deficient number, since it is larger than the sum of its proper divisors (51130113).

131317887 is a wasteful number, since it uses less digits than its factorization.

131317887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11030.

The product of its digits is 28224, while the sum is 39.

The square root of 131317887 is about 11459.4016859520. The cubic root of 131317887 is about 508.2857824792.

The spelling of 131317887 in words is "one hundred thirty-one million, three hundred seventeen thousand, eight hundred eighty-seven".