128304019 has 2 divisors, whose sum is σ = 128304020. Its totient is φ = 128304018.

The previous prime is 128303999. The next prime is 128304053. The reversal of 128304019 is 910403821.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128304019 - 2⁹ = 128303507 is a prime.

It is a super-2 number, since 2×128304019² = 32923842583104722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128304079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64152009 + 64152010.

It is an arithmetic number, because the mean of its divisors is an integer number (64152010).

Almost surely, 2^128304019 is an apocalyptic number.

128304019 is a deficient number, since it is larger than the sum of its proper divisors (1).

128304019 is an equidigital number, since it uses as much as digits as its factorization.

128304019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 128304019 is about 11327.1363989315. The cubic root of 128304019 is about 504.3671044145.

The spelling of 128304019 in words is "one hundred twenty-eight million, three hundred four thousand, nineteen".