243926893 has 4 divisors (see below), whose sum is σ = 278773600. Its totient is φ = 209080188.

The previous prime is 243926887. The next prime is 243926899. The reversal of 243926893 is 398629342.

243926893 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an interprime number because it is at equal distance from previous prime (243926887) and next prime (243926899).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243926893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243926899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17423343 + ... + 17423356.

It is an arithmetic number, because the mean of its divisors is an integer number (69693400).

Almost surely, 2^243926893 is an apocalyptic number.

It is an amenable number.

243926893 is a deficient number, since it is larger than the sum of its proper divisors (34846707).

243926893 is an equidigital number, since it uses as much as digits as its factorization.

243926893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34846706.

The product of its digits is 559872, while the sum is 46.

The square root of 243926893 is about 15618.1590784574. The cubic root of 243926893 is about 624.8175621114.

The spelling of 243926893 in words is "two hundred forty-three million, nine hundred twenty-six thousand, eight hundred ninety-three".