163707220717 has 2 divisors, whose sum is σ = 163707220718. Its totient is φ = 163707220716.

The previous prime is 163707220673. The next prime is 163707220751. The reversal of 163707220717 is 717022707361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155844142441 + 7863078276 = 394771^2 + 88674^2 .

It is a cyclic number.

It is not a de Polignac number, because 163707220717 - 2¹¹ = 163707218669 is a prime.

It is a super-2 number, since 2×163707220717² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163707280717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81853610358 + 81853610359.

It is an arithmetic number, because the mean of its divisors is an integer number (81853610359).

Almost surely, 2^163707220717 is an apocalyptic number.

It is an amenable number.

163707220717 is a deficient number, since it is larger than the sum of its proper divisors (1).

163707220717 is an equidigital number, since it uses as much as digits as its factorization.

163707220717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172872, while the sum is 43.

The spelling of 163707220717 in words is "one hundred sixty-three billion, seven hundred seven million, two hundred twenty thousand, seven hundred seventeen".