43213234837 has 2 divisors, whose sum is σ = 43213234838. Its totient is φ = 43213234836.

The previous prime is 43213234829. The next prime is 43213234853. The reversal of 43213234837 is 73843231234.

It is a happy number.

43213234837 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34492289841 + 8720944996 = 185721^2 + 93386^2 .

It is a cyclic number.

It is not a de Polignac number, because 43213234837 - 2³ = 43213234829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43213234837.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43213234037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21606617418 + 21606617419.

It is an arithmetic number, because the mean of its divisors is an integer number (21606617419).

Almost surely, 2^43213234837 is an apocalyptic number.

It is an amenable number.

43213234837 is a deficient number, since it is larger than the sum of its proper divisors (1).

43213234837 is an equidigital number, since it uses as much as digits as its factorization.

43213234837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 40.

The spelling of 43213234837 in words is "forty-three billion, two hundred thirteen million, two hundred thirty-four thousand, eight hundred thirty-seven".