43443444434437 has 2 divisors, whose sum is σ = 43443444434438. Its totient is φ = 43443444434436.

The previous prime is 43443444434431. The next prime is 43443444434471. The reversal of 43443444434437 is 73443444434434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43094682139716 + 348762294721 = 6564654^2 + 590561^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43443444434437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43443444434431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21721722217218 + 21721722217219.

It is an arithmetic number, because the mean of its divisors is an integer number (21721722217219).

Almost surely, 2^{43443444434437} is an apocalyptic number.

It is an amenable number.

43443444434437 is a deficient number, since it is larger than the sum of its proper divisors (1).

43443444434437 is an equidigital number, since it uses as much as digits as its factorization.

43443444434437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 148635648, while the sum is 55.

The spelling of 43443444434437 in words is "forty-three trillion, four hundred forty-three billion, four hundred forty-four million, four hundred thirty-four thousand, four hundred thirty-seven".