163800172 has 6 divisors (see below), whose sum is σ = 286650308. Its totient is φ = 81900084.

The previous prime is 163800163. The next prime is 163800191. The reversal of 163800172 is 271008361.

163800172 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 163800172.

It is an unprimeable number.

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, 20475018 + ... + 20475025.

Almost surely, 2^163800172 is an apocalyptic number.

It is an amenable number.

163800172 is a deficient number, since it is larger than the sum of its proper divisors (122850136).

163800172 is a wasteful number, since it uses less digits than its factorization.

163800172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40950047 (or 40950045 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 163800172 is about 12798.4441241895. Note that the first 3 decimals coincide. The cubic root of 163800172 is about 547.1479602013.

The spelling of 163800172 in words is "one hundred sixty-three million, eight hundred thousand, one hundred seventy-two".