1721343212593 has 2 divisors, whose sum is σ = 1721343212594. Its totient is φ = 1721343212592.

The previous prime is 1721343212579. The next prime is 1721343212609. The reversal of 1721343212593 is 3952123431271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1334736574864 + 386606637729 = 1155308^2 + 621777^2 .

It is a cyclic number.

It is not a de Polignac number, because 1721343212593 - 2³³ = 1712753278001 is a prime.

It is not a weakly prime, because it can be changed into another prime (1721343212093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 860671606296 + 860671606297.

It is an arithmetic number, because the mean of its divisors is an integer number (860671606297).

Almost surely, 2^{1721343212593} is an apocalyptic number.

It is an amenable number.

1721343212593 is a deficient number, since it is larger than the sum of its proper divisors (1).

1721343212593 is an equidigital number, since it uses as much as digits as its factorization.

1721343212593 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 43.

The spelling of 1721343212593 in words is "one trillion, seven hundred twenty-one billion, three hundred forty-three million, two hundred twelve thousand, five hundred ninety-three".