128050489 has 4 divisors (see below), whose sum is σ = 146343424. Its totient is φ = 109757556.

The previous prime is 128050471. The next prime is 128050493. The reversal of 128050489 is 984050821.

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.

It is a cyclic number.

It is not a de Polignac number, because 128050489 - 2¹¹ = 128048441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128050459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9146457 + ... + 9146470.

It is an arithmetic number, because the mean of its divisors is an integer number (36585856).

Almost surely, 2^128050489 is an apocalyptic number.

It is an amenable number.

128050489 is a deficient number, since it is larger than the sum of its proper divisors (18292935).

128050489 is an equidigital number, since it uses as much as digits as its factorization.

128050489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18292934.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 128050489 is about 11315.9395986370. The cubic root of 128050489 is about 504.0346739078.

The spelling of 128050489 in words is "one hundred twenty-eight million, fifty thousand, four hundred eighty-nine".