163988671 has 16 divisors (see below), whose sum is σ = 207924480. Its totient is φ = 125614080.

The previous prime is 163988611. The next prime is 163988683. The reversal of 163988671 is 176889361.

It is a cyclic number.

It is not a de Polignac number, because 163988671 - 2⁹ = 163988159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163988611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13506 + ... + 22591.

It is an arithmetic number, because the mean of its divisors is an integer number (12995280).

Almost surely, 2^163988671 is an apocalyptic number.

163988671 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

163988671 is a deficient number, since it is larger than the sum of its proper divisors (43935809).

163988671 is a wasteful number, since it uses less digits than its factorization.

163988671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36174.

The product of its digits is 435456, while the sum is 49.

The square root of 163988671 is about 12805.8061440895. The cubic root of 163988671 is about 547.3577632081.

The spelling of 163988671 in words is "one hundred sixty-three million, nine hundred eighty-eight thousand, six hundred seventy-one".