128913119987 has 2 divisors, whose sum is σ = 128913119988. Its totient is φ = 128913119986.

The previous prime is 128913119963. The next prime is 128913120013. The reversal of 128913119987 is 789911319821.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128913119987 is a prime.

It is not a weakly prime, because it can be changed into another prime (128913119927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64456559993 + 64456559994.

It is an arithmetic number, because the mean of its divisors is an integer number (64456559994).

Almost surely, 2^128913119987 is an apocalyptic number.

128913119987 is a deficient number, since it is larger than the sum of its proper divisors (1).

128913119987 is an equidigital number, since it uses as much as digits as its factorization.

128913119987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 59.

The spelling of 128913119987 in words is "one hundred twenty-eight billion, nine hundred thirteen million, one hundred nineteen thousand, nine hundred eighty-seven".