128323553 has 2 divisors, whose sum is σ = 128323554. Its totient is φ = 128323552.

The previous prime is 128323529. The next prime is 128323597. The reversal of 128323553 is 355323821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91259809 + 37063744 = 9553^2 + 6088^2 .

It is a cyclic number.

It is not a de Polignac number, because 128323553 - 2¹⁰ = 128322529 is a prime.

It is not a weakly prime, because it can be changed into another prime (128323513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64161776 + 64161777.

It is an arithmetic number, because the mean of its divisors is an integer number (64161777).

Almost surely, 2^128323553 is an apocalyptic number.

It is an amenable number.

128323553 is a deficient number, since it is larger than the sum of its proper divisors (1).

128323553 is an equidigital number, since it uses as much as digits as its factorization.

128323553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 32.

The square root of 128323553 is about 11327.9986317090. The cubic root of 128323553 is about 504.3926993702.

The spelling of 128323553 in words is "one hundred twenty-eight million, three hundred twenty-three thousand, five hundred fifty-three".