163859161 has 2 divisors, whose sum is σ = 163859162. Its totient is φ = 163859160.

The previous prime is 163859159. The next prime is 163859183. The reversal of 163859161 is 161958361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162945225 + 913936 = 12765^2 + 956^2 .

It is a cyclic number.

It is not a de Polignac number, because 163859161 - 2¹ = 163859159 is a prime.

Together with 163859159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (163859131) 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, 81929580 + 81929581.

It is an arithmetic number, because the mean of its divisors is an integer number (81929581).

Almost surely, 2^163859161 is an apocalyptic number.

It is an amenable number.

163859161 is a deficient number, since it is larger than the sum of its proper divisors (1).

163859161 is an equidigital number, since it uses as much as digits as its factorization.

163859161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 40.

The square root of 163859161 is about 12800.7484546803. The cubic root of 163859161 is about 547.2136333870.

The spelling of 163859161 in words is "one hundred sixty-three million, eight hundred fifty-nine thousand, one hundred sixty-one".