16871703217 has 2 divisors, whose sum is σ = 16871703218. Its totient is φ = 16871703216.

The previous prime is 16871703157. The next prime is 16871703229. The reversal of 16871703217 is 71230717861.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16795123216 + 76580001 = 129596^2 + 8751^2 .

It is a cyclic number.

It is not a de Polignac number, because 16871703217 - 2²³ = 16863314609 is a prime.

It is not a weakly prime, because it can be changed into another prime (16871703257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8435851608 + 8435851609.

It is an arithmetic number, because the mean of its divisors is an integer number (8435851609).

Almost surely, 2^16871703217 is an apocalyptic number.

It is an amenable number.

16871703217 is a deficient number, since it is larger than the sum of its proper divisors (1).

16871703217 is an equidigital number, since it uses as much as digits as its factorization.

16871703217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 98784, while the sum is 43.

The spelling of 16871703217 in words is "sixteen billion, eight hundred seventy-one million, seven hundred three thousand, two hundred seventeen".