128017663 has 2 divisors, whose sum is σ = 128017664. Its totient is φ = 128017662.

The previous prime is 128017657. The next prime is 128017679. The reversal of 128017663 is 366710821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128017663 - 2²¹ = 125920511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128017363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64008831 + 64008832.

It is an arithmetic number, because the mean of its divisors is an integer number (64008832).

Almost surely, 2^128017663 is an apocalyptic number.

128017663 is a deficient number, since it is larger than the sum of its proper divisors (1).

128017663 is an equidigital number, since it uses as much as digits as its factorization.

128017663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 128017663 is about 11314.4890737496. The cubic root of 128017663 is about 503.9916001267.

The spelling of 128017663 in words is "one hundred twenty-eight million, seventeen thousand, six hundred sixty-three".