43538791 has 2 divisors, whose sum is σ = 43538792. Its totient is φ = 43538790.

The previous prime is 43538771. The next prime is 43538801. The reversal of 43538791 is 19783534.

43538791 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43538791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43538771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21769395 + 21769396.

It is an arithmetic number, because the mean of its divisors is an integer number (21769396).

Almost surely, 2^43538791 is an apocalyptic number.

43538791 is a deficient number, since it is larger than the sum of its proper divisors (1).

43538791 is an equidigital number, since it uses as much as digits as its factorization.

43538791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 40.

The square root of 43538791 is about 6598.3930619508. The cubic root of 43538791 is about 351.7969919944.

The spelling of 43538791 in words is "forty-three million, five hundred thirty-eight thousand, seven hundred ninety-one".