43841387 has 2 divisors, whose sum is σ = 43841388. Its totient is φ = 43841386.

The previous prime is 43841333. The next prime is 43841389. The reversal of 43841387 is 78314834.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43841387 - 2¹² = 43837291 is a prime.

Together with 43841389, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43841387.

It is not a weakly prime, because it can be changed into another prime (43841389) 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, 21920693 + 21920694.

It is an arithmetic number, because the mean of its divisors is an integer number (21920694).

Almost surely, 2^43841387 is an apocalyptic number.

43841387 is a deficient number, since it is larger than the sum of its proper divisors (1).

43841387 is an equidigital number, since it uses as much as digits as its factorization.

43841387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 38.

The square root of 43841387 is about 6621.2828817383. The cubic root of 43841387 is about 352.6101113009.

The spelling of 43841387 in words is "forty-three million, eight hundred forty-one thousand, three hundred eighty-seven".