1728068517397 has 2 divisors, whose sum is σ = 1728068517398. Its totient is φ = 1728068517396.

The previous prime is 1728068517389. The next prime is 1728068517421. The reversal of 1728068517397 is 7937158608271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1515740171716 + 212328345681 = 1231154^2 + 460791^2 .

It is a cyclic number.

It is not a de Polignac number, because 1728068517397 - 2³ = 1728068517389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1728068517337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 864034258698 + 864034258699.

It is an arithmetic number, because the mean of its divisors is an integer number (864034258699).

Almost surely, 2^{1728068517397} is an apocalyptic number.

It is an amenable number.

1728068517397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1728068517397 is an equidigital number, since it uses as much as digits as its factorization.

1728068517397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35562240, while the sum is 64.

The spelling of 1728068517397 in words is "one trillion, seven hundred twenty-eight billion, sixty-eight million, five hundred seventeen thousand, three hundred ninety-seven".