128008427 has 2 divisors, whose sum is σ = 128008428. Its totient is φ = 128008426.

The previous prime is 128008417. The next prime is 128008451. The reversal of 128008427 is 724800821.

It is a weak prime.

It is an emirp because it is prime and its reverse (724800821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128008427 - 2¹⁶ = 127942891 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 128008393 and 128008402.

It is not a weakly prime, because it can be changed into another prime (128008417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64004213 + 64004214.

It is an arithmetic number, because the mean of its divisors is an integer number (64004214).

Almost surely, 2^128008427 is an apocalyptic number.

128008427 is a deficient number, since it is larger than the sum of its proper divisors (1).

128008427 is an equidigital number, since it uses as much as digits as its factorization.

128008427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 128008427 is about 11314.0809171581. The cubic root of 128008427 is about 503.9794794597.

The spelling of 128008427 in words is "one hundred twenty-eight million, eight thousand, four hundred twenty-seven".