128755199 has 2 divisors, whose sum is σ = 128755200. Its totient is φ = 128755198.

The previous prime is 128755177. The next prime is 128755217. The reversal of 128755199 is 991557821.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128755199 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128755999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64377599 + 64377600.

It is an arithmetic number, because the mean of its divisors is an integer number (64377600).

Almost surely, 2^128755199 is an apocalyptic number.

128755199 is a deficient number, since it is larger than the sum of its proper divisors (1).

128755199 is an equidigital number, since it uses as much as digits as its factorization.

128755199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 47.

The square root of 128755199 is about 11347.0348109099. The cubic root of 128755199 is about 504.9576136695.

The spelling of 128755199 in words is "one hundred twenty-eight million, seven hundred fifty-five thousand, one hundred ninety-nine".