128609003 has 8 divisors (see below), whose sum is σ = 132312048. Its totient is φ = 124917984.

The previous prime is 128608981. The next prime is 128609017. The reversal of 128609003 is 300906821.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128609003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128609053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21500 + ... + 26822.

It is an arithmetic number, because the mean of its divisors is an integer number (16539006).

Almost surely, 2^128609003 is an apocalyptic number.

128609003 is a deficient number, since it is larger than the sum of its proper divisors (3703045).

128609003 is an equidigital number, since it uses as much as digits as its factorization.

128609003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6013.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 128609003 is about 11340.5909458017. The cubic root of 128609003 is about 504.7664220585.

The spelling of 128609003 in words is "one hundred twenty-eight million, six hundred nine thousand, three".