128907403 has 4 divisors (see below), whose sum is σ = 132051528. Its totient is φ = 125763280.

The previous prime is 128907367. The next prime is 128907431. The reversal of 128907403 is 304709821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128907403 - 2¹⁷ = 128776331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128907463) 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 in 3 ways as a sum of consecutive naturals, for example, 1572001 + ... + 1572082.

It is an arithmetic number, because the mean of its divisors is an integer number (33012882).

Almost surely, 2^128907403 is an apocalyptic number.

128907403 is a deficient number, since it is larger than the sum of its proper divisors (3144125).

128907403 is an equidigital number, since it uses as much as digits as its factorization.

128907403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3144124.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 128907403 is about 11353.7396042009. The cubic root of 128907403 is about 505.1565086904.

The spelling of 128907403 in words is "one hundred twenty-eight million, nine hundred seven thousand, four hundred three".