163871243 has 4 divisors (see below), whose sum is σ = 164971200. Its totient is φ = 162771288.

The previous prime is 163871231. The next prime is 163871263. The reversal of 163871243 is 342178361.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 163871243 - 2⁶ = 163871179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163871263) 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, 549755 + ... + 550052.

It is an arithmetic number, because the mean of its divisors is an integer number (41242800).

Almost surely, 2^163871243 is an apocalyptic number.

163871243 is a deficient number, since it is larger than the sum of its proper divisors (1099957).

163871243 is a wasteful number, since it uses less digits than its factorization.

163871243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099956.

The product of its digits is 24192, while the sum is 35.

The square root of 163871243 is about 12801.2203715115. The cubic root of 163871243 is about 547.2270824827.

The spelling of 163871243 in words is "one hundred sixty-three million, eight hundred seventy-one thousand, two hundred forty-three".