128059409 has 2 divisors, whose sum is σ = 128059410. Its totient is φ = 128059408.

The previous prime is 128059387. The next prime is 128059427. The reversal of 128059409 is 904950821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107329600 + 20729809 = 10360^2 + 4553^2 .

It is a cyclic number.

It is not a de Polignac number, because 128059409 - 2¹² = 128055313 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (128059489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64029704 + 64029705.

It is an arithmetic number, because the mean of its divisors is an integer number (64029705).

Almost surely, 2^128059409 is an apocalyptic number.

It is an amenable number.

128059409 is a deficient number, since it is larger than the sum of its proper divisors (1).

128059409 is an equidigital number, since it uses as much as digits as its factorization.

128059409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 128059409 is about 11316.3337260793. Note that the first 3 decimals coincide. The cubic root of 128059409 is about 504.0463773251.

The spelling of 128059409 in words is "one hundred twenty-eight million, fifty-nine thousand, four hundred nine".