820163 has 2 divisors, whose sum is σ = 820164. Its totient is φ = 820162.

The previous prime is 820133. The next prime is 820177. The reversal of 820163 is 361028.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 820163 - 2¹⁶ = 754627 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 820163.

It is not a weakly prime, because it can be changed into another prime (820133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410081 + 410082.

It is an arithmetic number, because the mean of its divisors is an integer number (410082).

2⁸²⁰¹⁶³ is an apocalyptic number.

820163 is a deficient number, since it is larger than the sum of its proper divisors (1).

820163 is an equidigital number, since it uses as much as digits as its factorization.

820163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 820163 is about 905.6285110353. The cubic root of 820163 is about 93.6052177066.

The spelling of 820163 in words is "eight hundred twenty thousand, one hundred sixty-three".