1393389255317 has 2 divisors, whose sum is σ = 1393389255318. Its totient is φ = 1393389255316.

The previous prime is 1393389255311. The next prime is 1393389255337. The reversal of 1393389255317 is 7135529833931.

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., 1107863607601 + 285525647716 = 1052551^2 + 534346^2 .

It is an emirp because it is prime and its reverse (7135529833931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1393389255317 - 2²⁸ = 1393120819861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1393389255311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 696694627658 + 696694627659.

It is an arithmetic number, because the mean of its divisors is an integer number (696694627659).

Almost surely, 2^{1393389255317} is an apocalyptic number.

It is an amenable number.

1393389255317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1393389255317 is an equidigital number, since it uses as much as digits as its factorization.

1393389255317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18370800, while the sum is 59.

The spelling of 1393389255317 in words is "one trillion, three hundred ninety-three billion, three hundred eighty-nine million, two hundred fifty-five thousand, three hundred seventeen".