128266603 has 2 divisors, whose sum is σ = 128266604. Its totient is φ = 128266602.

The previous prime is 128266543. The next prime is 128266627. The reversal of 128266603 is 306662821.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128266603 - 2¹³ = 128258411 is a prime.

It is not a weakly prime, because it can be changed into another prime (128266643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64133301 + 64133302.

It is an arithmetic number, because the mean of its divisors is an integer number (64133302).

Almost surely, 2^128266603 is an apocalyptic number.

128266603 is a deficient number, since it is larger than the sum of its proper divisors (1).

128266603 is an equidigital number, since it uses as much as digits as its factorization.

128266603 is an odious number, because the sum of its binary digits is odd.

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

The square root of 128266603 is about 11325.4846695406. The cubic root of 128266603 is about 504.3180718265.

The spelling of 128266603 in words is "one hundred twenty-eight million, two hundred sixty-six thousand, six hundred three".