43340737409 has 2 divisors, whose sum is σ = 43340737410. Its totient is φ = 43340737408.

The previous prime is 43340737381. The next prime is 43340737459. The reversal of 43340737409 is 90473704334.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33912327409 + 9428410000 = 184153^2 + 97100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43340737409 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 43340737409.

It is not a weakly prime, because it can be changed into another prime (43340737459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21670368704 + 21670368705.

It is an arithmetic number, because the mean of its divisors is an integer number (21670368705).

Almost surely, 2^43340737409 is an apocalyptic number.

It is an amenable number.

43340737409 is a deficient number, since it is larger than the sum of its proper divisors (1).

43340737409 is an equidigital number, since it uses as much as digits as its factorization.

43340737409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 44.

The spelling of 43340737409 in words is "forty-three billion, three hundred forty million, seven hundred thirty-seven thousand, four hundred nine".