128135093 has 4 divisors (see below), whose sum is σ = 133706208. Its totient is φ = 122563980.

The previous prime is 128135087. The next prime is 128135123. The reversal of 128135093 is 390531821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 390531821 = 61 ⋅6402161.

It is a cyclic number.

It is not a de Polignac number, because 128135093 - 2⁸ = 128134837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128135893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2785523 + ... + 2785568.

It is an arithmetic number, because the mean of its divisors is an integer number (33426552).

Almost surely, 2^128135093 is an apocalyptic number.

It is an amenable number.

128135093 is a deficient number, since it is larger than the sum of its proper divisors (5571115).

128135093 is an equidigital number, since it uses as much as digits as its factorization.

128135093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5571114.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 128135093 is about 11319.6772480491. The cubic root of 128135093 is about 504.1456560726.

The spelling of 128135093 in words is "one hundred twenty-eight million, one hundred thirty-five thousand, ninety-three".