131321017 has 2 divisors, whose sum is σ = 131321018. Its totient is φ = 131321016.

The previous prime is 131320999. The next prime is 131321083. The reversal of 131321017 is 710123131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128618281 + 2702736 = 11341^2 + 1644^2 .

It is an emirp because it is prime and its reverse (710123131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131321017 - 2²³ = 122932409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131320985 and 131321003.

It is not a weakly prime, because it can be changed into another prime (131321317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65660508 + 65660509.

It is an arithmetic number, because the mean of its divisors is an integer number (65660509).

Almost surely, 2^131321017 is an apocalyptic number.

It is an amenable number.

131321017 is a deficient number, since it is larger than the sum of its proper divisors (1).

131321017 is an equidigital number, since it uses as much as digits as its factorization.

131321017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 126, while the sum is 19.

The square root of 131321017 is about 11459.5382542230. The cubic root of 131321017 is about 508.2898208269.

Adding to 131321017 its reverse (710123131), we get a palindrome (841444148).

The spelling of 131321017 in words is "one hundred thirty-one million, three hundred twenty-one thousand, seventeen".