1305423140393 has 2 divisors, whose sum is σ = 1305423140394. Its totient is φ = 1305423140392.

The previous prime is 1305423140341. The next prime is 1305423140443. The reversal of 1305423140393 is 3930413245031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 885249529129 + 420173611264 = 940877^2 + 648208^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1305423140393 is a prime.

It is not a weakly prime, because it can be changed into another prime (1305423140293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652711570196 + 652711570197.

It is an arithmetic number, because the mean of its divisors is an integer number (652711570197).

Almost surely, 2^{1305423140393} is an apocalyptic number.

It is an amenable number.

1305423140393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305423140393 is an equidigital number, since it uses as much as digits as its factorization.

1305423140393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 38.

The spelling of 1305423140393 in words is "one trillion, three hundred five billion, four hundred twenty-three million, one hundred forty thousand, three hundred ninety-three".