128905303 has 2 divisors, whose sum is σ = 128905304. Its totient is φ = 128905302.

The previous prime is 128905297. The next prime is 128905307. The reversal of 128905303 is 303509821.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (303509821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128905303 - 2¹⁷ = 128774231 is a prime.

It is equal to p_7319623 and since 128905303 and 7319623 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128905307) 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 as a sum of consecutive naturals, namely, 64452651 + 64452652.

It is an arithmetic number, because the mean of its divisors is an integer number (64452652).

Almost surely, 2^128905303 is an apocalyptic number.

128905303 is a deficient number, since it is larger than the sum of its proper divisors (1).

128905303 is an equidigital number, since it uses as much as digits as its factorization.

128905303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 128905303 is about 11353.6471232816. The cubic root of 128905303 is about 505.1537655471.

The spelling of 128905303 in words is "one hundred twenty-eight million, nine hundred five thousand, three hundred three".