128078113 has 2 divisors, whose sum is σ = 128078114. Its totient is φ = 128078112.

The previous prime is 128078089. The next prime is 128078141. The reversal of 128078113 is 311870821.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118548544 + 9529569 = 10888^2 + 3087^2 .

It is an emirp because it is prime and its reverse (311870821) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128078113 is a prime.

It is not a weakly prime, because it can be changed into another prime (128078173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64039056 + 64039057.

It is an arithmetic number, because the mean of its divisors is an integer number (64039057).

Almost surely, 2^128078113 is an apocalyptic number.

It is an amenable number.

128078113 is a deficient number, since it is larger than the sum of its proper divisors (1).

128078113 is an equidigital number, since it uses as much as digits as its factorization.

128078113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 128078113 is about 11317.1601119716. The cubic root of 128078113 is about 504.0709159996.

The spelling of 128078113 in words is "one hundred twenty-eight million, seventy-eight thousand, one hundred thirteen".