128919329 has 32 divisors (see below), whose sum is σ = 164858112. Its totient is φ = 98736000.

The previous prime is 128919319. The next prime is 128919337. The reversal of 128919329 is 923919821.

It is a happy number.

It is not a de Polignac number, because 128919329 - 2¹⁶ = 128853793 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128919329.

It is not an unprimeable number, because it can be changed into a prime (128919319) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 940949 + ... + 941085.

It is an arithmetic number, because the mean of its divisors is an integer number (5151816).

Almost surely, 2^128919329 is an apocalyptic number.

It is an amenable number.

128919329 is a deficient number, since it is larger than the sum of its proper divisors (35938783).

128919329 is a wasteful number, since it uses less digits than its factorization.

128919329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278 (or 256 counting only the distinct ones).

The product of its digits is 69984, while the sum is 44.

The square root of 128919329 is about 11354.2647934598. The cubic root of 128919329 is about 505.1720865667.

The spelling of 128919329 in words is "one hundred twenty-eight million, nine hundred nineteen thousand, three hundred twenty-nine".