209142163 has 2 divisors, whose sum is σ = 209142164. Its totient is φ = 209142162.

The previous prime is 209142161. The next prime is 209142169. The reversal of 209142163 is 361241902.

209142163 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 209142163 - 2¹ = 209142161 is a prime.

Together with 209142161, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (209142161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104571081 + 104571082.

It is an arithmetic number, because the mean of its divisors is an integer number (104571082).

Almost surely, 2^209142163 is an apocalyptic number.

209142163 is a deficient number, since it is larger than the sum of its proper divisors (1).

209142163 is an equidigital number, since it uses as much as digits as its factorization.

209142163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 209142163 is about 14461.7482691409. The cubic root of 209142163 is about 593.5817389438.

The spelling of 209142163 in words is "two hundred nine million, one hundred forty-two thousand, one hundred sixty-three".