131333717 has 2 divisors, whose sum is σ = 131333718. Its totient is φ = 131333716.

The previous prime is 131333711. The next prime is 131333729. The reversal of 131333717 is 717333131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88378801 + 42954916 = 9401^2 + 6554^2 .

It is a cyclic number.

It is not a de Polignac number, because 131333717 - 2¹² = 131329621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131333717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131333711) 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, 65666858 + 65666859.

It is an arithmetic number, because the mean of its divisors is an integer number (65666859).

Almost surely, 2^131333717 is an apocalyptic number.

It is an amenable number.

131333717 is a deficient number, since it is larger than the sum of its proper divisors (1).

131333717 is an equidigital number, since it uses as much as digits as its factorization.

131333717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3969, while the sum is 29.

The square root of 131333717 is about 11460.0923643747. The cubic root of 131333717 is about 508.3062057965.

Adding to 131333717 its reverse (717333131), we get a palindrome (848666848).

The spelling of 131333717 in words is "one hundred thirty-one million, three hundred thirty-three thousand, seven hundred seventeen".