128083609 has 2 divisors, whose sum is σ = 128083610. Its totient is φ = 128083608.

The previous prime is 128083561. The next prime is 128083621. The reversal of 128083609 is 906380821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94478400 + 33605209 = 9720^2 + 5797^2 .

It is a cyclic number.

It is not a de Polignac number, because 128083609 - 2⁹ = 128083097 is a prime.

It is not a weakly prime, because it can be changed into another prime (128083649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64041804 + 64041805.

It is an arithmetic number, because the mean of its divisors is an integer number (64041805).

Almost surely, 2^128083609 is an apocalyptic number.

It is an amenable number.

128083609 is a deficient number, since it is larger than the sum of its proper divisors (1).

128083609 is an equidigital number, since it uses as much as digits as its factorization.

128083609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 128083609 is about 11317.4029264668. The cubic root of 128083609 is about 504.0781260114.

The spelling of 128083609 in words is "one hundred twenty-eight million, eighty-three thousand, six hundred nine".