84668341817 has 2 divisors, whose sum is σ = 84668341818. Its totient is φ = 84668341816.

The previous prime is 84668341801. The next prime is 84668341859. The reversal of 84668341817 is 71814386648.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45285542416 + 39382799401 = 212804^2 + 198451^2 .

It is a cyclic number.

It is not a de Polignac number, because 84668341817 - 2⁴ = 84668341801 is a prime.

It is a super-2 number, since 2×84668341817² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84668341897) 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, 42334170908 + 42334170909.

It is an arithmetic number, because the mean of its divisors is an integer number (42334170909).

Almost surely, 2^84668341817 is an apocalyptic number.

It is an amenable number.

84668341817 is a deficient number, since it is larger than the sum of its proper divisors (1).

84668341817 is an equidigital number, since it uses as much as digits as its factorization.

84668341817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6193152, while the sum is 56.

The spelling of 84668341817 in words is "eighty-four billion, six hundred sixty-eight million, three hundred forty-one thousand, eight hundred seventeen".