163861171 has 2 divisors, whose sum is σ = 163861172. Its totient is φ = 163861170.

The previous prime is 163861169. The next prime is 163861183. The reversal of 163861171 is 171168361.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 163861171 - 2¹ = 163861169 is a prime.

It is a super-2 number, since 2×163861171² = 53700966722982482, which contains 22 as substring.

Together with 163861169, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (163861151) 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, 81930585 + 81930586.

It is an arithmetic number, because the mean of its divisors is an integer number (81930586).

Almost surely, 2^163861171 is an apocalyptic number.

163861171 is a deficient number, since it is larger than the sum of its proper divisors (1).

163861171 is an equidigital number, since it uses as much as digits as its factorization.

163861171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 34.

The square root of 163861171 is about 12800.8269654738. The cubic root of 163861171 is about 547.2158708673.

The spelling of 163861171 in words is "one hundred sixty-three million, eight hundred sixty-one thousand, one hundred seventy-one".