43859649122813 has 2 divisors, whose sum is σ = 43859649122814. Its totient is φ = 43859649122812.

The previous prime is 43859649122719. The next prime is 43859649122831. The reversal of 43859649122813 is 31822194695834.

Together with next prime (43859649122831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29770151177209 + 14089497945604 = 5456203^2 + 3753598^2 .

It is a cyclic number.

It is not a de Polignac number, because 43859649122813 - 2⁸ = 43859649122557 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43859649122813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43859649112813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21929824561406 + 21929824561407.

It is an arithmetic number, because the mean of its divisors is an integer number (21929824561407).

Almost surely, 2^{43859649122813} is an apocalyptic number.

It is an amenable number.

43859649122813 is a deficient number, since it is larger than the sum of its proper divisors (1).

43859649122813 is an equidigital number, since it uses as much as digits as its factorization.

43859649122813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 89579520, while the sum is 65.

The spelling of 43859649122813 in words is "forty-three trillion, eight hundred fifty-nine billion, six hundred forty-nine million, one hundred twenty-two thousand, eight hundred thirteen".