128489573 has 4 divisors (see below), whose sum is σ = 128607168. Its totient is φ = 128371980.

The previous prime is 128489521. The next prime is 128489579. The reversal of 128489573 is 375984821.

It is a happy number.

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: 375984821 = 73 ⋅5150477.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128489573 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128489579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57143 + ... + 59348.

It is an arithmetic number, because the mean of its divisors is an integer number (32151792).

Almost surely, 2^128489573 is an apocalyptic number.

It is an amenable number.

128489573 is a deficient number, since it is larger than the sum of its proper divisors (117595).

128489573 is a wasteful number, since it uses less digits than its factorization.

128489573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117594.

The product of its digits is 483840, while the sum is 47.

The square root of 128489573 is about 11335.3241241704. The cubic root of 128489573 is about 504.6101268210.

The spelling of 128489573 in words is "one hundred twenty-eight million, four hundred eighty-nine thousand, five hundred seventy-three".