43137841009 has 2 divisors, whose sum is σ = 43137841010. Its totient is φ = 43137841008.

The previous prime is 43137841007. The next prime is 43137841121. The reversal of 43137841009 is 90014873134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38635833600 + 4502007409 = 196560^2 + 67097^2 .

It is a cyclic number.

It is not a de Polignac number, because 43137841009 - 2¹ = 43137841007 is a prime.

Together with 43137841007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (43137841007) 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, 21568920504 + 21568920505.

It is an arithmetic number, because the mean of its divisors is an integer number (21568920505).

Almost surely, 2^43137841009 is an apocalyptic number.

It is an amenable number.

43137841009 is a deficient number, since it is larger than the sum of its proper divisors (1).

43137841009 is an equidigital number, since it uses as much as digits as its factorization.

43137841009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 43137841009 in words is "forty-three billion, one hundred thirty-seven million, eight hundred forty-one thousand, nine".