163859143 has 8 divisors (see below), whose sum is σ = 187410080. Its totient is φ = 140343840.

The previous prime is 163859131. The next prime is 163859147. The reversal of 163859143 is 341958361.

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-163859143 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 163859096 and 163859105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163859147) 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 7 ways as a sum of consecutive naturals, for example, 1813 + ... + 18193.

It is an arithmetic number, because the mean of its divisors is an integer number (23426260).

Almost surely, 2^163859143 is an apocalyptic number.

163859143 is a deficient number, since it is larger than the sum of its proper divisors (23550937).

163859143 is a wasteful number, since it uses less digits than its factorization.

163859143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17817.

The product of its digits is 77760, while the sum is 40.

The square root of 163859143 is about 12800.7477515964. The cubic root of 163859143 is about 547.2136133498.

The spelling of 163859143 in words is "one hundred sixty-three million, eight hundred fifty-nine thousand, one hundred forty-three".