128075657 has 2 divisors, whose sum is σ = 128075658. Its totient is φ = 128075656.

The previous prime is 128075639. The next prime is 128075681. The reversal of 128075657 is 756570821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118613881 + 9461776 = 10891^2 + 3076^2 .

It is a cyclic number.

It is not a de Polignac number, because 128075657 - 2¹⁰ = 128074633 is a prime.

It is not a weakly prime, because it can be changed into another prime (128077657) 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, 64037828 + 64037829.

It is an arithmetic number, because the mean of its divisors is an integer number (64037829).

Almost surely, 2^128075657 is an apocalyptic number.

It is an amenable number.

128075657 is a deficient number, since it is larger than the sum of its proper divisors (1).

128075657 is an equidigital number, since it uses as much as digits as its factorization.

128075657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 117600, while the sum is 41.

The square root of 128075657 is about 11317.0516036643. The cubic root of 128075657 is about 504.0676939917.

The spelling of 128075657 in words is "one hundred twenty-eight million, seventy-five thousand, six hundred fifty-seven".