4242356809 has 2 divisors, whose sum is σ = 4242356810. Its totient is φ = 4242356808.

The previous prime is 4242356791. The next prime is 4242356819. The reversal of 4242356809 is 9086532424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4092416784 + 149940025 = 63972^2 + 12245^2 .

It is a cyclic number.

It is not a de Polignac number, because 4242356809 - 2⁹ = 4242356297 is a prime.

It is not a weakly prime, because it can be changed into another prime (4242356819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2121178404 + 2121178405.

It is an arithmetic number, because the mean of its divisors is an integer number (2121178405).

Almost surely, 2^4242356809 is an apocalyptic number.

It is an amenable number.

4242356809 is a deficient number, since it is larger than the sum of its proper divisors (1).

4242356809 is an equidigital number, since it uses as much as digits as its factorization.

4242356809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 414720, while the sum is 43.

The square root of 4242356809 is about 65133.3770735097. The cubic root of 4242356809 is about 1618.8342994634.

The spelling of 4242356809 in words is "four billion, two hundred forty-two million, three hundred fifty-six thousand, eight hundred nine".