1317000356681 has 2 divisors, whose sum is σ = 1317000356682. Its totient is φ = 1317000356680.

The previous prime is 1317000356657. The next prime is 1317000356699. The reversal of 1317000356681 is 1866530007131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1194832631056 + 122167725625 = 1093084^2 + 349525^2 .

It is an emirp because it is prime and its reverse (1866530007131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1317000356681 - 2¹⁴ = 1317000340297 is a prime.

It is a super-2 number, since 2×1317000356681² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1317000350681) 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, 658500178340 + 658500178341.

It is an arithmetic number, because the mean of its divisors is an integer number (658500178341).

Almost surely, 2^{1317000356681} is an apocalyptic number.

It is an amenable number.

1317000356681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317000356681 is an equidigital number, since it uses as much as digits as its factorization.

1317000356681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 1317000356681 in words is "one trillion, three hundred seventeen billion, three hundred fifty-six thousand, six hundred eighty-one".