13530344447 has 2 divisors, whose sum is σ = 13530344448. Its totient is φ = 13530344446.

The previous prime is 13530344437. The next prime is 13530344449. The reversal of 13530344447 is 74444303531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13530344447 - 2⁴ = 13530344431 is a prime.

Together with 13530344449, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13530344447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13530344449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6765172223 + 6765172224.

It is an arithmetic number, because the mean of its divisors is an integer number (6765172224).

Almost surely, 2^13530344447 is an apocalyptic number.

13530344447 is a deficient number, since it is larger than the sum of its proper divisors (1).

13530344447 is an equidigital number, since it uses as much as digits as its factorization.

13530344447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 38.

Adding to 13530344447 its reverse (74444303531), we get a palindrome (87974647978).

The spelling of 13530344447 in words is "thirteen billion, five hundred thirty million, three hundred forty-four thousand, four hundred forty-seven".