128456089 has 2 divisors, whose sum is σ = 128456090. Its totient is φ = 128456088.

The previous prime is 128456077. The next prime is 128456101. The reversal of 128456089 is 980654821.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (128456077) and next prime (128456101).

It can be written as a sum of positive squares in only one way, i.e., 127870864 + 585225 = 11308^2 + 765^2 .

It is a cyclic number.

It is not a de Polignac number, because 128456089 - 2²¹ = 126358937 is a prime.

It is not a weakly prime, because it can be changed into another prime (128454089) 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, 64228044 + 64228045.

It is an arithmetic number, because the mean of its divisors is an integer number (64228045).

Almost surely, 2^128456089 is an apocalyptic number.

It is an amenable number.

128456089 is a deficient number, since it is larger than the sum of its proper divisors (1).

128456089 is an equidigital number, since it uses as much as digits as its factorization.

128456089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 128456089 is about 11333.8470520825. The cubic root of 128456089 is about 504.5662897142.

The spelling of 128456089 in words is "one hundred twenty-eight million, four hundred fifty-six thousand, eighty-nine".