128100403 has 2 divisors, whose sum is σ = 128100404. Its totient is φ = 128100402.

The previous prime is 128100391. The next prime is 128100433. The reversal of 128100403 is 304001821.

It is a weak prime.

It is an emirp because it is prime and its reverse (304001821) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128100403 is a prime.

It is not a weakly prime, because it can be changed into another prime (128100433) 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, 64050201 + 64050202.

It is an arithmetic number, because the mean of its divisors is an integer number (64050202).

Almost surely, 2^128100403 is an apocalyptic number.

128100403 is a deficient number, since it is larger than the sum of its proper divisors (1).

128100403 is an equidigital number, since it uses as much as digits as its factorization.

128100403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 128100403 is about 11318.1448568217. The cubic root of 128100403 is about 504.1001561998.

The spelling of 128100403 in words is "one hundred twenty-eight million, one hundred thousand, four hundred three".