1311345131497 has 2 divisors, whose sum is σ = 1311345131498. Its totient is φ = 1311345131496.

The previous prime is 1311345131489. The next prime is 1311345131527. The reversal of 1311345131497 is 7941315431131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1287780118416 + 23565013081 = 1134804^2 + 153509^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311345131497 - 2³ = 1311345131489 is a prime.

It is a super-2 number, since 2×1311345131497² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1311345131297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655672565748 + 655672565749.

It is an arithmetic number, because the mean of its divisors is an integer number (655672565749).

Almost surely, 2^{1311345131497} is an apocalyptic number.

It is an amenable number.

1311345131497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311345131497 is an equidigital number, since it uses as much as digits as its factorization.

1311345131497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 43.

The spelling of 1311345131497 in words is "one trillion, three hundred eleven billion, three hundred forty-five million, one hundred thirty-one thousand, four hundred ninety-seven".