1028549521393 has 2 divisors, whose sum is σ = 1028549521394. Its totient is φ = 1028549521392.

The previous prime is 1028549521339. The next prime is 1028549521463. The reversal of 1028549521393 is 3931259458201.

It is a happy number.

Together with previous prime (1028549521339) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 961278280704 + 67271240689 = 980448^2 + 259367^2 .

It is an emirp because it is prime and its reverse (3931259458201) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1028549521393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1028549521393.

It is not a weakly prime, because it can be changed into another prime (1028549521303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 514274760696 + 514274760697.

It is an arithmetic number, because the mean of its divisors is an integer number (514274760697).

Almost surely, 2^{1028549521393} is an apocalyptic number.

It is an amenable number.

1028549521393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1028549521393 is an equidigital number, since it uses as much as digits as its factorization.

1028549521393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2332800, while the sum is 52.

The spelling of 1028549521393 in words is "one trillion, twenty-eight billion, five hundred forty-nine million, five hundred twenty-one thousand, three hundred ninety-three".