128443903 has 8 divisors (see below), whose sum is σ = 149916672. Its totient is φ = 107752056.

The previous prime is 128443901. The next prime is 128443907. The reversal of 128443903 is 309344821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128443903 - 2¹ = 128443901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128443901) 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, 194875 + ... + 195532.

It is an arithmetic number, because the mean of its divisors is an integer number (18739584).

Almost surely, 2^128443903 is an apocalyptic number.

128443903 is a deficient number, since it is larger than the sum of its proper divisors (21472769).

128443903 is an equidigital number, since it uses as much as digits as its factorization.

128443903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390461.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 128443903 is about 11333.3094460533. The cubic root of 128443903 is about 504.5503339654.

The spelling of 128443903 in words is "one hundred twenty-eight million, four hundred forty-three thousand, nine hundred three".