128443927 has 2 divisors, whose sum is σ = 128443928. Its totient is φ = 128443926.

The previous prime is 128443921. The next prime is 128443957. The reversal of 128443927 is 729344821.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128443927 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128443927.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128443921) 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, 64221963 + 64221964.

It is an arithmetic number, because the mean of its divisors is an integer number (64221964).

Almost surely, 2^128443927 is an apocalyptic number.

128443927 is a deficient number, since it is larger than the sum of its proper divisors (1).

128443927 is an equidigital number, since it uses as much as digits as its factorization.

128443927 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 40.

The square root of 128443927 is about 11333.3105048790. The cubic root of 128443927 is about 504.5503653909.

The spelling of 128443927 in words is "one hundred twenty-eight million, four hundred forty-three thousand, nine hundred twenty-seven".