128544347 has 2 divisors, whose sum is σ = 128544348. Its totient is φ = 128544346.

The previous prime is 128544331. The next prime is 128544397. The reversal of 128544347 is 743445821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128544347 - 2⁴ = 128544331 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128544347.

It is not a weakly prime, because it can be changed into another prime (128544397) 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, 64272173 + 64272174.

It is an arithmetic number, because the mean of its divisors is an integer number (64272174).

Almost surely, 2^128544347 is an apocalyptic number.

128544347 is a deficient number, since it is larger than the sum of its proper divisors (1).

128544347 is an equidigital number, since it uses as much as digits as its factorization.

128544347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107520, while the sum is 38.

The square root of 128544347 is about 11337.7399423342. The cubic root of 128544347 is about 504.6818202871.

The spelling of 128544347 in words is "one hundred twenty-eight million, five hundred forty-four thousand, three hundred forty-seven".