128903039 has 4 divisors (see below), whose sum is σ = 129083040. Its totient is φ = 128723040.

The previous prime is 128902997. The next prime is 128903041. The reversal of 128903039 is 930309821.

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 128903039 - 2¹² = 128898943 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 (128903059) 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, 88922 + ... + 90359.

It is an arithmetic number, because the mean of its divisors is an integer number (32270760).

Almost surely, 2^128903039 is an apocalyptic number.

128903039 is a deficient number, since it is larger than the sum of its proper divisors (180001).

128903039 is an equidigital number, since it uses as much as digits as its factorization.

128903039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180000.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 128903039 is about 11353.5474191990. The cubic root of 128903039 is about 505.1508081440.

The spelling of 128903039 in words is "one hundred twenty-eight million, nine hundred three thousand, thirty-nine".