128433829 has 2 divisors, whose sum is σ = 128433830. Its totient is φ = 128433828.

The previous prime is 128433803. The next prime is 128433847. The reversal of 128433829 is 928334821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96000804 + 32433025 = 9798^2 + 5695^2 .

It is a cyclic number.

It is not a de Polignac number, because 128433829 - 2¹¹ = 128431781 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 128433791 and 128433800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128433859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64216914 + 64216915.

It is an arithmetic number, because the mean of its divisors is an integer number (64216915).

Almost surely, 2^128433829 is an apocalyptic number.

It is an amenable number.

128433829 is a deficient number, since it is larger than the sum of its proper divisors (1).

128433829 is an equidigital number, since it uses as much as digits as its factorization.

128433829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 40.

The square root of 128433829 is about 11332.8649952252. The cubic root of 128433829 is about 504.5371428036.

The spelling of 128433829 in words is "one hundred twenty-eight million, four hundred thirty-three thousand, eight hundred twenty-nine".