131386917 has 16 divisors (see below), whose sum is σ = 176852480. Its totient is φ = 86761152.

The previous prime is 131386901. The next prime is 131386921. The reversal of 131386917 is 719683131.

It is not a de Polignac number, because 131386917 - 2⁴ = 131386901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131386967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184959 + ... + 185667.

It is an arithmetic number, because the mean of its divisors is an integer number (11053280).

Almost surely, 2^131386917 is an apocalyptic number.

It is an amenable number.

131386917 is a deficient number, since it is larger than the sum of its proper divisors (45465563).

131386917 is a wasteful number, since it uses less digits than its factorization.

131386917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212.

The product of its digits is 27216, while the sum is 39.

The square root of 131386917 is about 11462.4132275887. The cubic root of 131386917 is about 508.3748305697.

The spelling of 131386917 in words is "one hundred thirty-one million, three hundred eighty-six thousand, nine hundred seventeen".