163967172 has 12 divisors (see below), whose sum is σ = 382590096. Its totient is φ = 54655720.

The previous prime is 163967171. The next prime is 163967179. The reversal of 163967172 is 271769361.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (163967171) 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 3 ways as a sum of consecutive naturals, for example, 6831954 + ... + 6831977.

It is an arithmetic number, because the mean of its divisors is an integer number (31882508).

Almost surely, 2^163967172 is an apocalyptic number.

163967172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

163967172 is an abundant number, since it is smaller than the sum of its proper divisors (218622924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163967172 is a wasteful number, since it uses less digits than its factorization.

163967172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13663938 (or 13663936 counting only the distinct ones).

The product of its digits is 95256, while the sum is 42.

The square root of 163967172 is about 12804.9666926548. The cubic root of 163967172 is about 547.3338425337. Note that the first 3 decimals are identical.

The spelling of 163967172 in words is "one hundred sixty-three million, nine hundred sixty-seven thousand, one hundred seventy-two".