243425717 has 2 divisors, whose sum is σ = 243425718. Its totient is φ = 243425716.

The previous prime is 243425657. The next prime is 243425719. The reversal of 243425717 is 717524342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200902276 + 42523441 = 14174^2 + 6521^2 .

It is a cyclic number.

It is not a de Polignac number, because 243425717 - 2⁶ = 243425653 is a prime.

Together with 243425719, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243425719) 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 as a sum of consecutive naturals, namely, 121712858 + 121712859.

It is an arithmetic number, because the mean of its divisors is an integer number (121712859).

Almost surely, 2^243425717 is an apocalyptic number.

It is an amenable number.

243425717 is a deficient number, since it is larger than the sum of its proper divisors (1).

243425717 is an equidigital number, since it uses as much as digits as its factorization.

243425717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 35.

The square root of 243425717 is about 15602.1061719244. The cubic root of 243425717 is about 624.3893487357.

The spelling of 243425717 in words is "two hundred forty-three million, four hundred twenty-five thousand, seven hundred seventeen".