13129747987 has 2 divisors, whose sum is σ = 13129747988. Its totient is φ = 13129747986.

The previous prime is 13129747979. The next prime is 13129747993. The reversal of 13129747987 is 78974792131.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13129747987 - 2³ = 13129747979 is a prime.

It is a super-3 number, since 3×13129747987³ (a number of 31 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (13129747957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6564873993 + 6564873994.

It is an arithmetic number, because the mean of its divisors is an integer number (6564873994).

Almost surely, 2^13129747987 is an apocalyptic number.

13129747987 is a deficient number, since it is larger than the sum of its proper divisors (1).

13129747987 is an equidigital number, since it uses as much as digits as its factorization.

13129747987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5334336, while the sum is 58.

The spelling of 13129747987 in words is "thirteen billion, one hundred twenty-nine million, seven hundred forty-seven thousand, nine hundred eighty-seven".