163861172 has 12 divisors (see below), whose sum is σ = 291617760. Its totient is φ = 80541816.

The previous prime is 163861171. The next prime is 163861183. The reversal of 163861172 is 271168361.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163861171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 346928 + ... + 347399.

It is an arithmetic number, because the mean of its divisors is an integer number (24301480).

Almost surely, 2^163861172 is an apocalyptic number.

It is an amenable number.

163861172 is a deficient number, since it is larger than the sum of its proper divisors (127756588).

163861172 is a wasteful number, since it uses less digits than its factorization.

163861172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694390 (or 694388 counting only the distinct ones).

The product of its digits is 12096, while the sum is 35.

The square root of 163861172 is about 12800.8270045337. The cubic root of 163861172 is about 547.2158719804.

The spelling of 163861172 in words is "one hundred sixty-three million, eight hundred sixty-one thousand, one hundred seventy-two".