243253663 has 8 divisors (see below), whose sum is σ = 257699232. Its totient is φ = 228823296.

The previous prime is 243253649. The next prime is 243253691. The reversal of 243253663 is 366352342.

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

It is a cyclic number.

It is not a de Polignac number, because 243253663 - 2⁹ = 243253151 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243253603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57931 + ... + 61987.

It is an arithmetic number, because the mean of its divisors is an integer number (32212404).

Almost surely, 2^243253663 is an apocalyptic number.

243253663 is a deficient number, since it is larger than the sum of its proper divisors (14445569).

243253663 is a wasteful number, since it uses less digits than its factorization.

243253663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7601.

The product of its digits is 77760, while the sum is 34.

The square root of 243253663 is about 15596.5913904289. The cubic root of 243253663 is about 624.2422073318.

The spelling of 243253663 in words is "two hundred forty-three million, two hundred fifty-three thousand, six hundred sixty-three".