243978324903 has 12 divisors (see below), whose sum is σ = 355834624080. Its totient is φ = 161073068256.

The previous prime is 243978324901. The next prime is 243978324917. The reversal of 243978324903 is 309423879342.

243978324903 is a `hidden beast` number, since 2 + 4 + 397 + 8 + 3 + 249 + 0 + 3 = 666.

It is not a de Polignac number, because 243978324903 - 2¹ = 243978324901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243978324903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243978324901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 131594718 + ... + 131596571.

It is an arithmetic number, because the mean of its divisors is an integer number (29652885340).

Almost surely, 2^243978324903 is an apocalyptic number.

243978324903 is a deficient number, since it is larger than the sum of its proper divisors (111856299177).

243978324903 is a wasteful number, since it uses less digits than its factorization.

243978324903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263191398 (or 263191395 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 54.

The spelling of 243978324903 in words is "two hundred forty-three billion, nine hundred seventy-eight million, three hundred twenty-four thousand, nine hundred three".