243745163 has 4 divisors (see below), whose sum is σ = 243788160. Its totient is φ = 243702168.

The previous prime is 243745153. The next prime is 243745171. The reversal of 243745163 is 361547342.

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 243745163 - 2¹⁶ = 243679627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243745153) 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, 11420 + ... + 24857.

It is an arithmetic number, because the mean of its divisors is an integer number (60947040).

Almost surely, 2^243745163 is an apocalyptic number.

243745163 is a deficient number, since it is larger than the sum of its proper divisors (42997).

243745163 is an equidigital number, since it uses as much as digits as its factorization.

243745163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42996.

The product of its digits is 60480, while the sum is 35.

The square root of 243745163 is about 15612.3400872515. The cubic root of 243745163 is about 624.6623567214.

The spelling of 243745163 in words is "two hundred forty-three million, seven hundred forty-five thousand, one hundred sixty-three".