163871953 has 8 divisors (see below), whose sum is σ = 193740480. Its totient is φ = 135618000.

The previous prime is 163871909. The next prime is 163871971. The reversal of 163871953 is 359178361.

163871953 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-163871953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163871153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 403423 + ... + 403828.

It is an arithmetic number, because the mean of its divisors is an integer number (24217560).

Almost surely, 2^163871953 is an apocalyptic number.

It is an amenable number.

163871953 is a deficient number, since it is larger than the sum of its proper divisors (29868527).

163871953 is an equidigital number, since it uses as much as digits as its factorization.

163871953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807287.

The product of its digits is 136080, while the sum is 43.

The square root of 163871953 is about 12801.2481032124. The cubic root of 163871953 is about 547.2278727997.

The spelling of 163871953 in words is "one hundred sixty-three million, eight hundred seventy-one thousand, nine hundred fifty-three".