131812717 has 2 divisors, whose sum is σ = 131812718. Its totient is φ = 131812716.

The previous prime is 131812699. The next prime is 131812739. The reversal of 131812717 is 717218131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79192201 + 52620516 = 8899^2 + 7254^2 .

It is a cyclic number.

It is not a de Polignac number, because 131812717 - 2²³ = 123424109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131812757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65906358 + 65906359.

It is an arithmetic number, because the mean of its divisors is an integer number (65906359).

Almost surely, 2^131812717 is an apocalyptic number.

It is an amenable number.

131812717 is a deficient number, since it is larger than the sum of its proper divisors (1).

131812717 is an equidigital number, since it uses as much as digits as its factorization.

131812717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2352, while the sum is 31.

The square root of 131812717 is about 11480.9719536283. The cubic root of 131812717 is about 508.9234204045.

The spelling of 131812717 in words is "one hundred thirty-one million, eight hundred twelve thousand, seven hundred seventeen".