13405243431397 has 2 divisors, whose sum is σ = 13405243431398. Its totient is φ = 13405243431396.

The previous prime is 13405243431317. The next prime is 13405243431401. The reversal of 13405243431397 is 79313434250431.

13405243431397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11954437635361 + 1450805796036 = 3457519^2 + 1204494^2 .

It is a cyclic number.

It is not a de Polignac number, because 13405243431397 - 2¹⁹ = 13405242907109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13405243431397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13405243431317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6702621715698 + 6702621715699.

It is an arithmetic number, because the mean of its divisors is an integer number (6702621715699).

Almost surely, 2^{13405243431397} is an apocalyptic number.

It is an amenable number.

13405243431397 is a deficient number, since it is larger than the sum of its proper divisors (1).

13405243431397 is an equidigital number, since it uses as much as digits as its factorization.

13405243431397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3265920, while the sum is 49.

The spelling of 13405243431397 in words is "thirteen trillion, four hundred five billion, two hundred forty-three million, four hundred thirty-one thousand, three hundred ninety-seven".