242518709 has 2 divisors, whose sum is σ = 242518710. Its totient is φ = 242518708.

The previous prime is 242518699. The next prime is 242518711. The reversal of 242518709 is 907815242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214534609 + 27984100 = 14647^2 + 5290^2 .

It is a cyclic number.

It is not a de Polignac number, because 242518709 - 2²⁰ = 241470133 is a prime.

Together with 242518711, 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 (242518769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121259354 + 121259355.

It is an arithmetic number, because the mean of its divisors is an integer number (121259355).

Almost surely, 2^242518709 is an apocalyptic number.

It is an amenable number.

242518709 is a deficient number, since it is larger than the sum of its proper divisors (1).

242518709 is an equidigital number, since it uses as much as digits as its factorization.

242518709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 242518709 is about 15573.0122005988. The cubic root of 242518709 is about 623.6128887667.

The spelling of 242518709 in words is "two hundred forty-two million, five hundred eighteen thousand, seven hundred nine".