163884449 has 2 divisors, whose sum is σ = 163884450. Its totient is φ = 163884448.

The previous prime is 163884419. The next prime is 163884463. The reversal of 163884449 is 944488361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150430225 + 13454224 = 12265^2 + 3668^2 .

It is an emirp because it is prime and its reverse (944488361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163884449 - 2¹⁶ = 163818913 is a prime.

It is a super-2 number, since 2×163884449² = 53716225248067202, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (163884419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81942224 + 81942225.

It is an arithmetic number, because the mean of its divisors is an integer number (81942225).

Almost surely, 2^163884449 is an apocalyptic number.

It is an amenable number.

163884449 is a deficient number, since it is larger than the sum of its proper divisors (1).

163884449 is an equidigital number, since it uses as much as digits as its factorization.

163884449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 663552, while the sum is 47.

The square root of 163884449 is about 12801.7361713168. The cubic root of 163884449 is about 547.2417820046.

The spelling of 163884449 in words is "one hundred sixty-three million, eight hundred eighty-four thousand, four hundred forty-nine".