4243664039 has 2 divisors, whose sum is σ = 4243664040. Its totient is φ = 4243664038.

The previous prime is 4243664027. The next prime is 4243664053. The reversal of 4243664039 is 9304663424.

4243664039 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4243664039 - 2¹² = 4243659943 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 4243663987 and 4243664005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4243660039) 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, 2121832019 + 2121832020.

It is an arithmetic number, because the mean of its divisors is an integer number (2121832020).

Almost surely, 2^4243664039 is an apocalyptic number.

4243664039 is a deficient number, since it is larger than the sum of its proper divisors (1).

4243664039 is an equidigital number, since it uses as much as digits as its factorization.

4243664039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 41.

The square root of 4243664039 is about 65143.4113245538. The cubic root of 4243664039 is about 1619.0005570049. Note that the first 3 decimals are identical.

The spelling of 4243664039 in words is "four billion, two hundred forty-three million, six hundred sixty-four thousand, thirty-nine".