84317885173 has 2 divisors, whose sum is σ = 84317885174. Its totient is φ = 84317885172.

The previous prime is 84317885153. The next prime is 84317885219. The reversal of 84317885173 is 37158871348.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47168021124 + 37149864049 = 217182^2 + 192743^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84317885173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84317885153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42158942586 + 42158942587.

It is an arithmetic number, because the mean of its divisors is an integer number (42158942587).

Almost surely, 2^84317885173 is an apocalyptic number.

It is an amenable number.

84317885173 is a deficient number, since it is larger than the sum of its proper divisors (1).

84317885173 is an equidigital number, since it uses as much as digits as its factorization.

84317885173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4515840, while the sum is 55.

The spelling of 84317885173 in words is "eighty-four billion, three hundred seventeen million, eight hundred eighty-five thousand, one hundred seventy-three".