131648717 has 2 divisors, whose sum is σ = 131648718. Its totient is φ = 131648716.

The previous prime is 131648689. The next prime is 131648771. The reversal of 131648717 is 717846131.

It is a happy number.

Together with next prime (131648771) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101989801 + 29658916 = 10099^2 + 5446^2 .

It is a cyclic number.

It is not a de Polignac number, because 131648717 - 2⁶ = 131648653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131648117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65824358 + 65824359.

It is an arithmetic number, because the mean of its divisors is an integer number (65824359).

Almost surely, 2^131648717 is an apocalyptic number.

It is an amenable number.

131648717 is a deficient number, since it is larger than the sum of its proper divisors (1).

131648717 is an equidigital number, since it uses as much as digits as its factorization.

131648717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 38.

The square root of 131648717 is about 11473.8274782219. The cubic root of 131648717 is about 508.7122670814.

The spelling of 131648717 in words is "one hundred thirty-one million, six hundred forty-eight thousand, seven hundred seventeen".