128380943 has 2 divisors, whose sum is σ = 128380944. Its totient is φ = 128380942.

The previous prime is 128380937. The next prime is 128380961. The reversal of 128380943 is 349083821.

It is a weak prime.

It is an emirp because it is prime and its reverse (349083821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128380943 - 2¹⁴ = 128364559 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128380897 and 128380906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128383943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64190471 + 64190472.

It is an arithmetic number, because the mean of its divisors is an integer number (64190472).

Almost surely, 2^128380943 is an apocalyptic number.

128380943 is a deficient number, since it is larger than the sum of its proper divisors (1).

128380943 is an equidigital number, since it uses as much as digits as its factorization.

128380943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 128380943 is about 11330.5314526725. The cubic root of 128380943 is about 504.4678811590.

The spelling of 128380943 in words is "one hundred twenty-eight million, three hundred eighty thousand, nine hundred forty-three".