243366593 has 4 divisors (see below), whose sum is σ = 243482928. Its totient is φ = 243250260.

The previous prime is 243366587. The next prime is 243366601. The reversal of 243366593 is 395663342.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 243366593 - 2¹⁰ = 243365569 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 243366593.

It is not an unprimeable number, because it can be changed into a prime (243369593) 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, 54971 + ... + 59232.

It is an arithmetic number, because the mean of its divisors is an integer number (60870732).

Almost surely, 2^243366593 is an apocalyptic number.

It is an amenable number.

243366593 is a deficient number, since it is larger than the sum of its proper divisors (116335).

243366593 is a wasteful number, since it uses less digits than its factorization.

243366593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116334.

The product of its digits is 349920, while the sum is 41.

The square root of 243366593 is about 15600.2113126714. The cubic root of 243366593 is about 624.3387934294.

The spelling of 243366593 in words is "two hundred forty-three million, three hundred sixty-six thousand, five hundred ninety-three".