128864503 has 4 divisors (see below), whose sum is σ = 130679568. Its totient is φ = 127049440.

The previous prime is 128864473. The next prime is 128864509. The reversal of 128864503 is 305468821.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128864503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128864509) 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, 907426 + ... + 907567.

It is an arithmetic number, because the mean of its divisors is an integer number (32669892).

Almost surely, 2^128864503 is an apocalyptic number.

128864503 is a deficient number, since it is larger than the sum of its proper divisors (1815065).

128864503 is an equidigital number, since it uses as much as digits as its factorization.

128864503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1815064.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 128864503 is about 11351.8502016191. The cubic root of 128864503 is about 505.1004642786.

The spelling of 128864503 in words is "one hundred twenty-eight million, eight hundred sixty-four thousand, five hundred three".