84728134819 has 2 divisors, whose sum is σ = 84728134820. Its totient is φ = 84728134818.

The previous prime is 84728134801. The next prime is 84728134847. The reversal of 84728134819 is 91843182748.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84728134819 - 2⁵ = 84728134787 is a prime.

It is a super-3 number, since 3×84728134819³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 84728134819.

It is not a weakly prime, because it can be changed into another prime (84728134849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42364067409 + 42364067410.

It is an arithmetic number, because the mean of its divisors is an integer number (42364067410).

Almost surely, 2^84728134819 is an apocalyptic number.

84728134819 is a deficient number, since it is larger than the sum of its proper divisors (1).

84728134819 is an equidigital number, since it uses as much as digits as its factorization.

84728134819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3096576, while the sum is 55.

The spelling of 84728134819 in words is "eighty-four billion, seven hundred twenty-eight million, one hundred thirty-four thousand, eight hundred nineteen".