243243391893 has 8 divisors (see below), whose sum is σ = 324347799168. Its totient is φ = 162150622944.

The previous prime is 243243391849. The next prime is 243243392057. The reversal of 243243391893 is 398193342342.

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

It is not a de Polignac number, because 243243391893 - 2⁶ = 243243391829 is a prime.

It is a super-2 number, since 2×243243391893² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243243391813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2860696 + ... + 2944497.

It is an arithmetic number, because the mean of its divisors is an integer number (40543474896).

Almost surely, 2^243243391893 is an apocalyptic number.

It is an amenable number.

243243391893 is a deficient number, since it is larger than the sum of its proper divisors (81104407275).

243243391893 is a wasteful number, since it uses less digits than its factorization.

243243391893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5819163.

The product of its digits is 3359232, while the sum is 51.

The spelling of 243243391893 in words is "two hundred forty-three billion, two hundred forty-three million, three hundred ninety-one thousand, eight hundred ninety-three".