131284717 has 2 divisors, whose sum is σ = 131284718. Its totient is φ = 131284716.

The previous prime is 131284709. The next prime is 131284729. The reversal of 131284717 is 717482131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131194116 + 90601 = 11454^2 + 301^2 .

It is a cyclic number.

It is not a de Polignac number, because 131284717 - 2³ = 131284709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131284817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65642358 + 65642359.

It is an arithmetic number, because the mean of its divisors is an integer number (65642359).

Almost surely, 2^131284717 is an apocalyptic number.

It is an amenable number.

131284717 is a deficient number, since it is larger than the sum of its proper divisors (1).

131284717 is an equidigital number, since it uses as much as digits as its factorization.

131284717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9408, while the sum is 34.

The square root of 131284717 is about 11457.9543113071. The cubic root of 131284717 is about 508.2429823713.

The spelling of 131284717 in words is "one hundred thirty-one million, two hundred eighty-four thousand, seven hundred seventeen".