128839219 has 2 divisors, whose sum is σ = 128839220. Its totient is φ = 128839218.

The previous prime is 128839213. The next prime is 128839253. The reversal of 128839219 is 912938821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128839219 - 2³ = 128839211 is a prime.

It is a super-2 number, since 2×128839219² = 33199088705059922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128839211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64419609 + 64419610.

It is an arithmetic number, because the mean of its divisors is an integer number (64419610).

Almost surely, 2^128839219 is an apocalyptic number.

128839219 is a deficient number, since it is larger than the sum of its proper divisors (1).

128839219 is an equidigital number, since it uses as much as digits as its factorization.

128839219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 43.

The square root of 128839219 is about 11350.7364959284. The cubic root of 128839219 is about 505.0674275225.

The spelling of 128839219 in words is "one hundred twenty-eight million, eight hundred thirty-nine thousand, two hundred nineteen".