243044020039 has 2 divisors, whose sum is σ = 243044020040. Its totient is φ = 243044020038.

The previous prime is 243044019983. The next prime is 243044020067. The reversal of 243044020039 is 930020440342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243044020039 - 2¹⁵ = 243043987271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243044020099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121522010019 + 121522010020.

It is an arithmetic number, because the mean of its divisors is an integer number (121522010020).

Almost surely, 2^243044020039 is an apocalyptic number.

243044020039 is a deficient number, since it is larger than the sum of its proper divisors (1).

243044020039 is an equidigital number, since it uses as much as digits as its factorization.

243044020039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 31.

The spelling of 243044020039 in words is "two hundred forty-three billion, forty-four million, twenty thousand, thirty-nine".