128134089 has 8 divisors (see below), whose sum is σ = 189828320. Its totient is φ = 85422708.

The previous prime is 128134087. The next prime is 128134091. The reversal of 128134089 is 980431821.

It is an interprime number because it is at equal distance from previous prime (128134087) and next prime (128134091).

It is not a de Polignac number, because 128134089 - 2¹ = 128134087 is a prime.

It is a super-3 number, since 3×128134089³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128134087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2372827 + ... + 2372880.

It is an arithmetic number, because the mean of its divisors is an integer number (23728540).

Almost surely, 2^128134089 is an apocalyptic number.

It is an amenable number.

128134089 is a deficient number, since it is larger than the sum of its proper divisors (61694231).

128134089 is an equidigital number, since it uses as much as digits as its factorization.

128134089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4745716 (or 4745710 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 128134089 is about 11319.6329004080. The cubic root of 128134089 is about 504.1443393280.

The spelling of 128134089 in words is "one hundred twenty-eight million, one hundred thirty-four thousand, eighty-nine".