128028727 has 2 divisors, whose sum is σ = 128028728. Its totient is φ = 128028726.

The previous prime is 128028701. The next prime is 128028731. The reversal of 128028727 is 727820821.

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-128028727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128028737) 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, 64014363 + 64014364.

It is an arithmetic number, because the mean of its divisors is an integer number (64014364).

Almost surely, 2^128028727 is an apocalyptic number.

128028727 is a deficient number, since it is larger than the sum of its proper divisors (1).

128028727 is an equidigital number, since it uses as much as digits as its factorization.

128028727 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 128028727 is about 11314.9779937921. The cubic root of 128028727 is about 504.0061189628.

The spelling of 128028727 in words is "one hundred twenty-eight million, twenty-eight thousand, seven hundred twenty-seven".