243420317 has 8 divisors (see below), whose sum is σ = 282755712. Its totient is φ = 205225200.

The previous prime is 243420301. The next prime is 243420319. The reversal of 243420317 is 713024342.

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

It is a cyclic number.

It is not a de Polignac number, because 243420317 - 2⁴ = 243420301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243420319) 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 in 7 ways as a sum of consecutive naturals, for example, 284609 + ... + 285462.

It is an arithmetic number, because the mean of its divisors is an integer number (35344464).

Almost surely, 2^243420317 is an apocalyptic number.

It is an amenable number.

243420317 is a deficient number, since it is larger than the sum of its proper divisors (39335395).

243420317 is an equidigital number, since it uses as much as digits as its factorization.

243420317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570139.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 243420317 is about 15601.9331174057. The cubic root of 243420317 is about 624.3847316839.

Adding to 243420317 its reverse (713024342), we get a palindrome (956444659).

The spelling of 243420317 in words is "two hundred forty-three million, four hundred twenty thousand, three hundred seventeen".