128753329 has 4 divisors (see below), whose sum is σ = 135529840. Its totient is φ = 121976820.

The previous prime is 128753327. The next prime is 128753369. The reversal of 128753329 is 923357821.

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 a cyclic number.

It is not a de Polignac number, because 128753329 - 2¹ = 128753327 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128753291 and 128753300.

It is not an unprimeable number, because it can be changed into a prime (128753327) 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, 3388227 + ... + 3388264.

It is an arithmetic number, because the mean of its divisors is an integer number (33882460).

Almost surely, 2^128753329 is an apocalyptic number.

128753329 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

128753329 is a deficient number, since it is larger than the sum of its proper divisors (6776511).

128753329 is an equidigital number, since it uses as much as digits as its factorization.

128753329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6776510.

The product of its digits is 90720, while the sum is 40.

The square root of 128753329 is about 11346.9524102289. The cubic root of 128753329 is about 504.9551690425.

The spelling of 128753329 in words is "one hundred twenty-eight million, seven hundred fifty-three thousand, three hundred twenty-nine".