13509863443 has 2 divisors, whose sum is σ = 13509863444. Its totient is φ = 13509863442.

The previous prime is 13509863387. The next prime is 13509863447. The reversal of 13509863443 is 34436890531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13509863443 - 2⁹ = 13509862931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13509863393 and 13509863402.

It is not a weakly prime, because it can be changed into another prime (13509863447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6754931721 + 6754931722.

It is an arithmetic number, because the mean of its divisors is an integer number (6754931722).

Almost surely, 2^13509863443 is an apocalyptic number.

13509863443 is a deficient number, since it is larger than the sum of its proper divisors (1).

13509863443 is an equidigital number, since it uses as much as digits as its factorization.

13509863443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 933120, while the sum is 46.

The spelling of 13509863443 in words is "thirteen billion, five hundred nine million, eight hundred sixty-three thousand, four hundred forty-three".