131664717 has 16 divisors (see below), whose sum is σ = 196262080. Its totient is φ = 87235056.

The previous prime is 131664713. The next prime is 131664733. The reversal of 131664717 is 717466131.

131664717 is a `hidden beast` number, since 1 + 3 + 1 + 6 + 647 + 1 + 7 = 666.

It is not a de Polignac number, because 131664717 - 2² = 131664713 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 (131664713) 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, 10558 + ... + 19359.

It is an arithmetic number, because the mean of its divisors is an integer number (12266380).

Almost surely, 2^131664717 is an apocalyptic number.

It is an amenable number.

131664717 is a deficient number, since it is larger than the sum of its proper divisors (64597363).

131664717 is a wasteful number, since it uses less digits than its factorization.

131664717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30089 (or 30083 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 131664717 is about 11474.5246960386. The cubic root of 131664717 is about 508.7328751226.

The spelling of 131664717 in words is "one hundred thirty-one million, six hundred sixty-four thousand, seven hundred seventeen".