128338843 has 2 divisors, whose sum is σ = 128338844. Its totient is φ = 128338842.

The previous prime is 128338841. The next prime is 128338849. The reversal of 128338843 is 348833821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128338843 - 2¹ = 128338841 is a prime.

Together with 128338841, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 128338796 and 128338805.

It is not a weakly prime, because it can be changed into another prime (128338841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64169421 + 64169422.

It is an arithmetic number, because the mean of its divisors is an integer number (64169422).

Almost surely, 2^128338843 is an apocalyptic number.

128338843 is a deficient number, since it is larger than the sum of its proper divisors (1).

128338843 is an equidigital number, since it uses as much as digits as its factorization.

128338843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 110592, while the sum is 40.

The square root of 128338843 is about 11328.6734881009. The cubic root of 128338843 is about 504.4127316971.

The spelling of 128338843 in words is "one hundred twenty-eight million, three hundred thirty-eight thousand, eight hundred forty-three".