43120044137 has 2 divisors, whose sum is σ = 43120044138. Its totient is φ = 43120044136.

The previous prime is 43120044127. The next prime is 43120044139. The reversal of 43120044137 is 73144002134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26043827161 + 17076216976 = 161381^2 + 130676^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43120044137 is a prime.

Together with 43120044139, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43120044139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21560022068 + 21560022069.

It is an arithmetic number, because the mean of its divisors is an integer number (21560022069).

Almost surely, 2^43120044137 is an apocalyptic number.

It is an amenable number.

43120044137 is a deficient number, since it is larger than the sum of its proper divisors (1).

43120044137 is an equidigital number, since it uses as much as digits as its factorization.

43120044137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 29.

The spelling of 43120044137 in words is "forty-three billion, one hundred twenty million, forty-four thousand, one hundred thirty-seven".