84128807219 has 2 divisors, whose sum is σ = 84128807220. Its totient is φ = 84128807218.

The previous prime is 84128807209. The next prime is 84128807291. The reversal of 84128807219 is 91270882148.

Together with next prime (84128807291) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84128807219 - 2⁸ = 84128806963 is a prime.

It is a super-2 number, since 2×84128807219² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84128807209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42064403609 + 42064403610.

It is an arithmetic number, because the mean of its divisors is an integer number (42064403610).

Almost surely, 2^84128807219 is an apocalyptic number.

84128807219 is a deficient number, since it is larger than the sum of its proper divisors (1).

84128807219 is an equidigital number, since it uses as much as digits as its factorization.

84128807219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 516096, while the sum is 50.

The spelling of 84128807219 in words is "eighty-four billion, one hundred twenty-eight million, eight hundred seven thousand, two hundred nineteen".