128752829 has 8 divisors (see below), whose sum is σ = 130439160. Its totient is φ = 127072000.

The previous prime is 128752817. The next prime is 128752843. The reversal of 128752829 is 928257821.

It can be written as a sum of positive squares in 4 ways, for example, as 18292729 + 110460100 = 4277^2 + 10510^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128752829 - 2²⁴ = 111975613 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 128752829.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128722829) 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 7 ways as a sum of consecutive naturals, for example, 66779 + ... + 68679.

It is an arithmetic number, because the mean of its divisors is an integer number (16304895).

Almost surely, 2^128752829 is an apocalyptic number.

It is an amenable number.

128752829 is a deficient number, since it is larger than the sum of its proper divisors (1686331).

128752829 is an equidigital number, since it uses as much as digits as its factorization.

128752829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2751.

The product of its digits is 161280, while the sum is 44.

The square root of 128752829 is about 11346.9303778599. The cubic root of 128752829 is about 504.9545153949.

The spelling of 128752829 in words is "one hundred twenty-eight million, seven hundred fifty-two thousand, eight hundred twenty-nine".