181000163 has 2 divisors, whose sum is σ = 181000164. Its totient is φ = 181000162.

The previous prime is 181000129. The next prime is 181000177. The reversal of 181000163 is 361000181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 181000163 - 2¹⁴ = 180983779 is a prime.

It is a super-2 number, since 2×181000163² = 65522118012053138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (181000663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90500081 + 90500082.

It is an arithmetic number, because the mean of its divisors is an integer number (90500082).

Almost surely, 2^181000163 is an apocalyptic number.

181000163 is a deficient number, since it is larger than the sum of its proper divisors (1).

181000163 is an equidigital number, since it uses as much as digits as its factorization.

181000163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 181000163 is about 13453.6301049196. The cubic root of 181000163 is about 565.6654523860.

The spelling of 181000163 in words is "one hundred eighty-one million, one hundred sixty-three", and thus it is an aban number.