163939161 has 8 divisors (see below), whose sum is σ = 220591360. Its totient is φ = 108289872.

The previous prime is 163939159. The next prime is 163939189. The reversal of 163939161 is 161939361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 163939161 - 2¹ = 163939159 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (163939661) 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 in 7 ways as a sum of consecutive naturals, for example, 250345 + ... + 250998.

It is an arithmetic number, because the mean of its divisors is an integer number (27573920).

Almost surely, 2^163939161 is an apocalyptic number.

It is an amenable number.

163939161 is a deficient number, since it is larger than the sum of its proper divisors (56652199).

163939161 is a wasteful number, since it uses less digits than its factorization.

163939161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501455.

The product of its digits is 26244, while the sum is 39.

The square root of 163939161 is about 12803.8728906530. The cubic root of 163939161 is about 547.3026732022.

The spelling of 163939161 in words is "one hundred sixty-three million, nine hundred thirty-nine thousand, one hundred sixty-one".