243673205413 has 4 divisors (see below), whose sum is σ = 265825315008. Its totient is φ = 221521095820.

The previous prime is 243673205353. The next prime is 243673205429. The reversal of 243673205413 is 314502376342.

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 243673205413 - 2¹³ = 243673197221 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243673205513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11076054781 + ... + 11076054802.

It is an arithmetic number, because the mean of its divisors is an integer number (66456328752).

Almost surely, 2^243673205413 is an apocalyptic number.

It is an amenable number.

243673205413 is a deficient number, since it is larger than the sum of its proper divisors (22152109595).

243673205413 is a wasteful number, since it uses less digits than its factorization.

243673205413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22152109594.

The product of its (nonzero) digits is 362880, while the sum is 40.

The spelling of 243673205413 in words is "two hundred forty-three billion, six hundred seventy-three million, two hundred five thousand, four hundred thirteen".