128811203 has 4 divisors (see below), whose sum is σ = 135590760. Its totient is φ = 122031648.

The previous prime is 128811197. The next prime is 128811257. The reversal of 128811203 is 302118821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128811203 - 2⁶ = 128811139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128811283) 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, 3389750 + ... + 3389787.

It is an arithmetic number, because the mean of its divisors is an integer number (33897690).

Almost surely, 2^128811203 is an apocalyptic number.

128811203 is a deficient number, since it is larger than the sum of its proper divisors (6779557).

128811203 is an equidigital number, since it uses as much as digits as its factorization.

128811203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6779556.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 128811203 is about 11349.5023238907. The cubic root of 128811203 is about 505.0308160132.

The spelling of 128811203 in words is "one hundred twenty-eight million, eight hundred eleven thousand, two hundred three".