163924233817 has 2 divisors, whose sum is σ = 163924233818. Its totient is φ = 163924233816.

The previous prime is 163924233793. The next prime is 163924233839. The reversal of 163924233817 is 718332429361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163892186896 + 32046921 = 404836^2 + 5661^2 .

It is an emirp because it is prime and its reverse (718332429361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163924233817 - 2¹⁹ = 163923709529 is a prime.

It is not a weakly prime, because it can be changed into another prime (163924233887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81962116908 + 81962116909.

It is an arithmetic number, because the mean of its divisors is an integer number (81962116909).

Almost surely, 2^163924233817 is an apocalyptic number.

It is an amenable number.

163924233817 is a deficient number, since it is larger than the sum of its proper divisors (1).

163924233817 is an equidigital number, since it uses as much as digits as its factorization.

163924233817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 49.

The spelling of 163924233817 in words is "one hundred sixty-three billion, nine hundred twenty-four million, two hundred thirty-three thousand, eight hundred seventeen".