242444309 has 2 divisors, whose sum is σ = 242444310. Its totient is φ = 242444308.

The previous prime is 242444299. The next prime is 242444333. The reversal of 242444309 is 903444242.

242444309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180821809 + 61622500 = 13447^2 + 7850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242444309 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242444359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121222154 + 121222155.

It is an arithmetic number, because the mean of its divisors is an integer number (121222155).

Almost surely, 2^242444309 is an apocalyptic number.

It is an amenable number.

242444309 is a deficient number, since it is larger than the sum of its proper divisors (1).

242444309 is an equidigital number, since it uses as much as digits as its factorization.

242444309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 242444309 is about 15570.6232694777. The cubic root of 242444309 is about 623.5491114957.

The spelling of 242444309 in words is "two hundred forty-two million, four hundred forty-four thousand, three hundred nine".