243905713 has 2 divisors, whose sum is σ = 243905714. Its totient is φ = 243905712.

The previous prime is 243905707. The next prime is 243905719. The reversal of 243905713 is 317509342.

243905713 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (243905707) and next prime (243905719).

It can be written as a sum of positive squares in only one way, i.e., 184199184 + 59706529 = 13572^2 + 7727^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243905713 is a prime.

It is not a weakly prime, because it can be changed into another prime (243905719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121952856 + 121952857.

It is an arithmetic number, because the mean of its divisors is an integer number (121952857).

Almost surely, 2^243905713 is an apocalyptic number.

It is an amenable number.

243905713 is a deficient number, since it is larger than the sum of its proper divisors (1).

243905713 is an equidigital number, since it uses as much as digits as its factorization.

243905713 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 243905713 is about 15617.4810068718. The cubic root of 243905713 is about 624.7994774320.

It can be divided in two parts, 24390 and 5713, that added together give a palindrome (30103).

The spelling of 243905713 in words is "two hundred forty-three million, nine hundred five thousand, seven hundred thirteen".