84900219689 has 2 divisors, whose sum is σ = 84900219690. Its totient is φ = 84900219688.

The previous prime is 84900219671. The next prime is 84900219743. The reversal of 84900219689 is 98691200948.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44898219664 + 40002000025 = 211892^2 + 200005^2 .

It is a cyclic number.

It is not a de Polignac number, because 84900219689 - 2⁸ = 84900219433 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (84900219389) 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, 42450109844 + 42450109845.

It is an arithmetic number, because the mean of its divisors is an integer number (42450109845).

Almost surely, 2^84900219689 is an apocalyptic number.

It is an amenable number.

84900219689 is a deficient number, since it is larger than the sum of its proper divisors (1).

84900219689 is an equidigital number, since it uses as much as digits as its factorization.

84900219689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2239488, while the sum is 56.

The spelling of 84900219689 in words is "eighty-four billion, nine hundred million, two hundred nineteen thousand, six hundred eighty-nine".