128730553 has 4 divisors (see below), whose sum is σ = 147120640. Its totient is φ = 110340468.

The previous prime is 128730521. The next prime is 128730559. The reversal of 128730553 is 355037821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 128730553 - 2⁵ = 128730521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128730559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9195033 + ... + 9195046.

It is an arithmetic number, because the mean of its divisors is an integer number (36780160).

Almost surely, 2^128730553 is an apocalyptic number.

It is an amenable number.

128730553 is a deficient number, since it is larger than the sum of its proper divisors (18390087).

128730553 is an equidigital number, since it uses as much as digits as its factorization.

128730553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18390086.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 128730553 is about 11345.9487483419. The cubic root of 128730553 is about 504.9253923700.

The spelling of 128730553 in words is "one hundred twenty-eight million, seven hundred thirty thousand, five hundred fifty-three".