243404011 has 4 divisors (see below), whose sum is σ = 257721912. Its totient is φ = 229086112.

The previous prime is 243403999. The next prime is 243404017. The reversal of 243404011 is 110404342.

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 243404011 - 2¹³ = 243395819 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243404011.

It is not an unprimeable number, because it can be changed into a prime (243404017) 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, 7158925 + ... + 7158958.

It is an arithmetic number, because the mean of its divisors is an integer number (64430478).

Almost surely, 2^243404011 is an apocalyptic number.

243404011 is a deficient number, since it is larger than the sum of its proper divisors (14317901).

243404011 is a wasteful number, since it uses less digits than its factorization.

243404011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14317900.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 243404011 is about 15601.4105452039. The cubic root of 243404011 is about 624.3707894832.

Adding to 243404011 its reverse (110404342), we get a palindrome (353808353).

The spelling of 243404011 in words is "two hundred forty-three million, four hundred four thousand, eleven".