128312843 has 2 divisors, whose sum is σ = 128312844. Its totient is φ = 128312842.

The previous prime is 128312831. The next prime is 128312851. The reversal of 128312843 is 348213821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128312843 - 2¹⁴ = 128296459 is a prime.

It is not a weakly prime, because it can be changed into another prime (128312893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64156421 + 64156422.

It is an arithmetic number, because the mean of its divisors is an integer number (64156422).

Almost surely, 2^128312843 is an apocalyptic number.

128312843 is a deficient number, since it is larger than the sum of its proper divisors (1).

128312843 is an equidigital number, since it uses as much as digits as its factorization.

128312843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 32.

The square root of 128312843 is about 11327.5258993304. The cubic root of 128312843 is about 504.3786666226.

The spelling of 128312843 in words is "one hundred twenty-eight million, three hundred twelve thousand, eight hundred forty-three".