128443429 has 2 divisors, whose sum is σ = 128443430. Its totient is φ = 128443428.

The previous prime is 128443411. The next prime is 128443453. The reversal of 128443429 is 924344821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128368900 + 74529 = 11330^2 + 273^2 .

It is an emirp because it is prime and its reverse (924344821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128443429 - 2¹¹ = 128441381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128443459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64221714 + 64221715.

It is an arithmetic number, because the mean of its divisors is an integer number (64221715).

Almost surely, 2^128443429 is an apocalyptic number.

It is an amenable number.

128443429 is a deficient number, since it is larger than the sum of its proper divisors (1).

128443429 is an equidigital number, since it uses as much as digits as its factorization.

128443429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 37.

The square root of 128443429 is about 11333.2885342252. The cubic root of 128443429 is about 504.5497133128.

The spelling of 128443429 in words is "one hundred twenty-eight million, four hundred forty-three thousand, four hundred twenty-nine".