12734399987 has 2 divisors, whose sum is σ = 12734399988. Its totient is φ = 12734399986.

The previous prime is 12734399959. The next prime is 12734400017. The reversal of 12734399987 is 78999343721.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12734399987 is a prime.

It is not a weakly prime, because it can be changed into another prime (12734399947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6367199993 + 6367199994.

It is an arithmetic number, because the mean of its divisors is an integer number (6367199994).

Almost surely, 2^12734399987 is an apocalyptic number.

12734399987 is a deficient number, since it is larger than the sum of its proper divisors (1).

12734399987 is an equidigital number, since it uses as much as digits as its factorization.

12734399987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20575296, while the sum is 62.

The spelling of 12734399987 in words is "twelve billion, seven hundred thirty-four million, three hundred ninety-nine thousand, nine hundred eighty-seven".