128976808487 has 2 divisors, whose sum is σ = 128976808488. Its totient is φ = 128976808486.

The previous prime is 128976808483. The next prime is 128976808511. The reversal of 128976808487 is 784808679821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128976808487 - 2² = 128976808483 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128976808483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64488404243 + 64488404244.

It is an arithmetic number, because the mean of its divisors is an integer number (64488404244).

Almost surely, 2^128976808487 is an apocalyptic number.

128976808487 is a deficient number, since it is larger than the sum of its proper divisors (1).

128976808487 is an equidigital number, since it uses as much as digits as its factorization.

128976808487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86704128, while the sum is 68.

The spelling of 128976808487 in words is "one hundred twenty-eight billion, nine hundred seventy-six million, eight hundred eight thousand, four hundred eighty-seven".