43043944939 has 2 divisors, whose sum is σ = 43043944940. Its totient is φ = 43043944938.

The previous prime is 43043944921. The next prime is 43043944949. The reversal of 43043944939 is 93944934034.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43043944939 - 2⁵ = 43043944907 is a prime.

It is not a weakly prime, because it can be changed into another prime (43043944949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21521972469 + 21521972470.

It is an arithmetic number, because the mean of its divisors is an integer number (21521972470).

Almost surely, 2^43043944939 is an apocalyptic number.

43043944939 is a deficient number, since it is larger than the sum of its proper divisors (1).

43043944939 is an equidigital number, since it uses as much as digits as its factorization.

43043944939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5038848, while the sum is 52.

The spelling of 43043944939 in words is "forty-three billion, forty-three million, nine hundred forty-four thousand, nine hundred thirty-nine".