13129387553 has 2 divisors, whose sum is σ = 13129387554. Its totient is φ = 13129387552.

The previous prime is 13129387549. The next prime is 13129387591. The reversal of 13129387553 is 35578392131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9660530944 + 3468856609 = 98288^2 + 58897^2 .

It is an emirp because it is prime and its reverse (35578392131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13129387553 - 2² = 13129387549 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13129387498 and 13129387507.

It is not a weakly prime, because it can be changed into another prime (13129587553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6564693776 + 6564693777.

It is an arithmetic number, because the mean of its divisors is an integer number (6564693777).

Almost surely, 2^13129387553 is an apocalyptic number.

It is an amenable number.

13129387553 is a deficient number, since it is larger than the sum of its proper divisors (1).

13129387553 is an equidigital number, since it uses as much as digits as its factorization.

13129387553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 47.

The spelling of 13129387553 in words is "thirteen billion, one hundred twenty-nine million, three hundred eighty-seven thousand, five hundred fifty-three".