43078211389 has 2 divisors, whose sum is σ = 43078211390. Its totient is φ = 43078211388.

The previous prime is 43078211381. The next prime is 43078211401. The reversal of 43078211389 is 98311287034.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40106871289 + 2971340100 = 200267^2 + 54510^2 .

It is a cyclic number.

It is not a de Polignac number, because 43078211389 - 2³ = 43078211381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43078211381) 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, 21539105694 + 21539105695.

It is an arithmetic number, because the mean of its divisors is an integer number (21539105695).

Almost surely, 2^43078211389 is an apocalyptic number.

It is an amenable number.

43078211389 is a deficient number, since it is larger than the sum of its proper divisors (1).

43078211389 is an equidigital number, since it uses as much as digits as its factorization.

43078211389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 43078211389 in words is "forty-three billion, seventy-eight million, two hundred eleven thousand, three hundred eighty-nine".