163671623 has 6 divisors (see below), whose sum is σ = 165539304. Its totient is φ = 161824784.

The previous prime is 163671593. The next prime is 163671637. The reversal of 163671623 is 326176361.

163671623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 163671623 - 2⁶ = 163671559 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 (163671323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2411 + ... + 18252.

It is an arithmetic number, because the mean of its divisors is an integer number (27589884).

Almost surely, 2^163671623 is an apocalyptic number.

163671623 is a deficient number, since it is larger than the sum of its proper divisors (1867681).

163671623 is an frugal number, since it uses more digits than its factorization.

163671623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20841 (or 20752 counting only the distinct ones).

The product of its digits is 27216, while the sum is 35.

The square root of 163671623 is about 12793.4210827284. The cubic root of 163671623 is about 547.0047903665.

The spelling of 163671623 in words is "one hundred sixty-three million, six hundred seventy-one thousand, six hundred twenty-three".