163811 has 2 divisors, whose sum is σ = 163812. Its totient is φ = 163810.

The previous prime is 163789. The next prime is 163819. The reversal of 163811 is 118361.

It is a strong prime.

It is an emirp because it is prime and its reverse (118361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163811 - 2¹⁰ = 162787 is a prime.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 163811.

It is not a weakly prime, because it can be changed into another prime (163819) 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, 81905 + 81906.

It is an arithmetic number, because the mean of its divisors is an integer number (81906).

2¹⁶³⁸¹¹ is an apocalyptic number.

163811 is a deficient number, since it is larger than the sum of its proper divisors (1).

163811 is an equidigital number, since it uses as much as digits as its factorization.

163811 is an odious number, because the sum of its binary digits is odd.

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

The square root of 163811 is about 404.7357162396. The cubic root of 163811 is about 54.7160016329.

The spelling of 163811 in words is "one hundred sixty-three thousand, eight hundred eleven".