13509863447 has 2 divisors, whose sum is σ = 13509863448. Its totient is φ = 13509863446.

The previous prime is 13509863443. The next prime is 13509863489. The reversal of 13509863447 is 74436890531.

It is a weak prime.

It is an emirp because it is prime and its reverse (74436890531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13509863447 - 2² = 13509863443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13509863395 and 13509863404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13509863443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6754931723 + 6754931724.

It is an arithmetic number, because the mean of its divisors is an integer number (6754931724).

Almost surely, 2^13509863447 is an apocalyptic number.

13509863447 is a deficient number, since it is larger than the sum of its proper divisors (1).

13509863447 is an equidigital number, since it uses as much as digits as its factorization.

13509863447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 50.

The spelling of 13509863447 in words is "thirteen billion, five hundred nine million, eight hundred sixty-three thousand, four hundred forty-seven".