131368817 has 2 divisors, whose sum is σ = 131368818. Its totient is φ = 131368816.

The previous prime is 131368771. The next prime is 131368819. The reversal of 131368817 is 718863131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131239936 + 128881 = 11456^2 + 359^2 .

It is a cyclic number.

It is not a de Polignac number, because 131368817 - 2¹² = 131364721 is a prime.

Together with 131368819, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131368819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65684408 + 65684409.

It is an arithmetic number, because the mean of its divisors is an integer number (65684409).

Almost surely, 2^131368817 is an apocalyptic number.

It is an amenable number.

131368817 is a deficient number, since it is larger than the sum of its proper divisors (1).

131368817 is an equidigital number, since it uses as much as digits as its factorization.

131368817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 38.

The square root of 131368817 is about 11461.6236633385. The cubic root of 131368817 is about 508.3514847471.

The spelling of 131368817 in words is "one hundred thirty-one million, three hundred sixty-eight thousand, eight hundred seventeen".