128338403 has 2 divisors, whose sum is σ = 128338404. Its totient is φ = 128338402.

The previous prime is 128338381. The next prime is 128338417. The reversal of 128338403 is 304833821.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (304833821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128338403 - 2⁶ = 128338339 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128338403.

It is not a weakly prime, because it can be changed into another prime (128338303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64169201 + 64169202.

It is an arithmetic number, because the mean of its divisors is an integer number (64169202).

Almost surely, 2^128338403 is an apocalyptic number.

128338403 is a deficient number, since it is larger than the sum of its proper divisors (1).

128338403 is an equidigital number, since it uses as much as digits as its factorization.

128338403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 128338403 is about 11328.6540683349. The cubic root of 128338403 is about 504.4121552495.

The spelling of 128338403 in words is "one hundred twenty-eight million, three hundred thirty-eight thousand, four hundred three".