84006549174217 has 2 divisors, whose sum is σ = 84006549174218. Its totient is φ = 84006549174216.

The previous prime is 84006549174203. The next prime is 84006549174269. The reversal of 84006549174217 is 71247194560048.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49275752869561 + 34730796304656 = 7019669^2 + 5893284^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84006549174217 is a prime.

It is not a weakly prime, because it can be changed into another prime (84006549174277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42003274587108 + 42003274587109.

It is an arithmetic number, because the mean of its divisors is an integer number (42003274587109).

Almost surely, 2^{84006549174217} is an apocalyptic number.

It is an amenable number.

84006549174217 is a deficient number, since it is larger than the sum of its proper divisors (1).

84006549174217 is an equidigital number, since it uses as much as digits as its factorization.

84006549174217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13547520, while the sum is 58.

The spelling of 84006549174217 in words is "eighty-four trillion, six billion, five hundred forty-nine million, one hundred seventy-four thousand, two hundred seventeen".