242440422409 has 2 divisors, whose sum is σ = 242440422410. Its totient is φ = 242440422408.

The previous prime is 242440422407. The next prime is 242440422461. The reversal of 242440422409 is 904224044242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129542406400 + 112898016009 = 359920^2 + 336003^2 .

It is a cyclic number.

It is not a de Polignac number, because 242440422409 - 2¹ = 242440422407 is a prime.

Together with 242440422407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (242440422407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121220211204 + 121220211205.

It is an arithmetic number, because the mean of its divisors is an integer number (121220211205).

Almost surely, 2^242440422409 is an apocalyptic number.

It is an amenable number.

242440422409 is a deficient number, since it is larger than the sum of its proper divisors (1).

242440422409 is an equidigital number, since it uses as much as digits as its factorization.

242440422409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 147456, while the sum is 37.

The spelling of 242440422409 in words is "two hundred forty-two billion, four hundred forty million, four hundred twenty-two thousand, four hundred nine".