128023829 has 2 divisors, whose sum is σ = 128023830. Its totient is φ = 128023828.

The previous prime is 128023793. The next prime is 128023837. The reversal of 128023829 is 928320821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93566929 + 34456900 = 9673^2 + 5870^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128023829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128023859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64011914 + 64011915.

It is an arithmetic number, because the mean of its divisors is an integer number (64011915).

Almost surely, 2^128023829 is an apocalyptic number.

It is an amenable number.

128023829 is a deficient number, since it is larger than the sum of its proper divisors (1).

128023829 is an equidigital number, since it uses as much as digits as its factorization.

128023829 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 128023829 is about 11314.7615529449. The cubic root of 128023829 is about 503.9996916203. Note that the first 3 decimals are identical.

The spelling of 128023829 in words is "one hundred twenty-eight million, twenty-three thousand, eight hundred twenty-nine".