128785603 has 2 divisors, whose sum is σ = 128785604. Its totient is φ = 128785602.

The previous prime is 128785597. The next prime is 128785621. The reversal of 128785603 is 306587821.

It is a weak prime.

It is an emirp because it is prime and its reverse (306587821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128785603 - 2¹⁷ = 128654531 is a prime.

It is not a weakly prime, because it can be changed into another prime (128785673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64392801 + 64392802.

It is an arithmetic number, because the mean of its divisors is an integer number (64392802).

Almost surely, 2^128785603 is an apocalyptic number.

128785603 is a deficient number, since it is larger than the sum of its proper divisors (1).

128785603 is an equidigital number, since it uses as much as digits as its factorization.

128785603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 128785603 is about 11348.3744650941. The cubic root of 128785603 is about 504.9973571080.

It can be divided in two parts, 12878 and 5603, that added together give a palindrome (18481).

The spelling of 128785603 in words is "one hundred twenty-eight million, seven hundred eighty-five thousand, six hundred three".