128803 has 4 divisors (see below), whose sum is σ = 129808. Its totient is φ = 127800.

The previous prime is 128767. The next prime is 128813. The reversal of 128803 is 308821.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 128803 - 2⁹ = 128291 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (128813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276 + ... + 577.

It is an arithmetic number, because the mean of its divisors is an integer number (32452).

2¹²⁸⁸⁰³ is an apocalyptic number.

128803 is a deficient number, since it is larger than the sum of its proper divisors (1005).

128803 is an equidigital number, since it uses as much as digits as its factorization.

128803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 128803 is about 358.8913484608. The cubic root of 128803 is about 50.5020095269.

The spelling of 128803 in words is "one hundred twenty-eight thousand, eight hundred three".