128243419 has 2 divisors, whose sum is σ = 128243420. Its totient is φ = 128243418.

The previous prime is 128243389. The next prime is 128243447. The reversal of 128243419 is 914342821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128243419 - 2¹³ = 128235227 is a prime.

It is a super-2 number, since 2×128243419² = 32892749033619122, which contains 22 as substring.

It is equal to p_7284085 and since 128243419 and 7284085 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (128243719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64121709 + 64121710.

It is an arithmetic number, because the mean of its divisors is an integer number (64121710).

Almost surely, 2^128243419 is an apocalyptic number.

128243419 is a deficient number, since it is larger than the sum of its proper divisors (1).

128243419 is an equidigital number, since it uses as much as digits as its factorization.

128243419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 34.

The square root of 128243419 is about 11324.4610909306. The cubic root of 128243419 is about 504.2876850789.

The spelling of 128243419 in words is "one hundred twenty-eight million, two hundred forty-three thousand, four hundred nineteen".