128999603 has 2 divisors, whose sum is σ = 128999604. Its totient is φ = 128999602.

The previous prime is 128999597. The next prime is 128999609. The reversal of 128999603 is 306999821.

It is a balanced prime because it is at equal distance from previous prime (128999597) and next prime (128999609).

It is a cyclic number.

It is not a de Polignac number, because 128999603 - 2⁶ = 128999539 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (128999609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64499801 + 64499802.

It is an arithmetic number, because the mean of its divisors is an integer number (64499802).

Almost surely, 2^128999603 is an apocalyptic number.

128999603 is a deficient number, since it is larger than the sum of its proper divisors (1).

128999603 is an equidigital number, since it uses as much as digits as its factorization.

128999603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 47.

The square root of 128999603 is about 11357.7992146366. The cubic root of 128999603 is about 505.2769163866.

The spelling of 128999603 in words is "one hundred twenty-eight million, nine hundred ninety-nine thousand, six hundred three".