4242439849 has 2 divisors, whose sum is σ = 4242439850. Its totient is φ = 4242439848.

The previous prime is 4242439843. The next prime is 4242439853. The reversal of 4242439849 is 9489342424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2620928025 + 1621511824 = 51195^2 + 40268^2 .

It is a cyclic number.

It is not a de Polignac number, because 4242439849 - 2¹³ = 4242431657 is a prime.

It is not a weakly prime, because it can be changed into another prime (4242439843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2121219924 + 2121219925.

It is an arithmetic number, because the mean of its divisors is an integer number (2121219925).

Almost surely, 2^4242439849 is an apocalyptic number.

It is an amenable number.

4242439849 is a deficient number, since it is larger than the sum of its proper divisors (1).

4242439849 is an equidigital number, since it uses as much as digits as its factorization.

4242439849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1990656, while the sum is 49.

The square root of 4242439849 is about 65134.0145315794. The cubic root of 4242439849 is about 1618.8448617624.

The spelling of 4242439849 in words is "four billion, two hundred forty-two million, four hundred thirty-nine thousand, eight hundred forty-nine".