999999163 has 2 divisors, whose sum is σ = 999999164. Its totient is φ = 999999162.

The previous prime is 999999151. The next prime is 999999181. The reversal of 999999163 is 361999999.

It is a weak prime.

It is an emirp because it is prime and its reverse (361999999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999999163 - 2⁵ = 999999131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 999999095 and 999999104.

It is not a weakly prime, because it can be changed into another prime (999999103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999581 + 499999582.

It is an arithmetic number, because the mean of its divisors is an integer number (499999582).

Almost surely, 2^999999163 is an apocalyptic number.

999999163 is a deficient number, since it is larger than the sum of its proper divisors (1).

999999163 is an equidigital number, since it uses as much as digits as its factorization.

999999163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9565938, while the sum is 64.

The square root of 999999163 is about 31622.7633675490. The cubic root of 999999163 is about 999.9997209999. Note that the first 3 decimals are identical.

The spelling of 999999163 in words is "nine hundred ninety-nine million, nine hundred ninety-nine thousand, one hundred sixty-three".