163855369 has 2 divisors, whose sum is σ = 163855370. Its totient is φ = 163855368.

The previous prime is 163855357. The next prime is 163855399. The reversal of 163855369 is 963558361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159693769 + 4161600 = 12637^2 + 2040^2 .

It is an emirp because it is prime and its reverse (963558361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163855369 - 2⁵ = 163855337 is a prime.

It is a super-2 number, since 2×163855369² = 53697163900252322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (163855309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81927684 + 81927685.

It is an arithmetic number, because the mean of its divisors is an integer number (81927685).

Almost surely, 2^163855369 is an apocalyptic number.

It is an amenable number.

163855369 is a deficient number, since it is larger than the sum of its proper divisors (1).

163855369 is an equidigital number, since it uses as much as digits as its factorization.

163855369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 583200, while the sum is 46.

The square root of 163855369 is about 12800.6003374842. The cubic root of 163855369 is about 547.2094121804.

The spelling of 163855369 in words is "one hundred sixty-three million, eight hundred fifty-five thousand, three hundred sixty-nine".