43509841 has 2 divisors, whose sum is σ = 43509842. Its totient is φ = 43509840.

The previous prime is 43509799. The next prime is 43509847. The reversal of 43509841 is 14890534.

43509841 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 can be written as a sum of positive squares in only one way, i.e., 39187600 + 4322241 = 6260^2 + 2079^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43509841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43509797 and 43509806.

It is not a weakly prime, because it can be changed into another prime (43509847) 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, 21754920 + 21754921.

It is an arithmetic number, because the mean of its divisors is an integer number (21754921).

Almost surely, 2^43509841 is an apocalyptic number.

It is an amenable number.

43509841 is a deficient number, since it is larger than the sum of its proper divisors (1).

43509841 is an equidigital number, since it uses as much as digits as its factorization.

43509841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 43509841 is about 6596.1989812315. The cubic root of 43509841 is about 351.7190019168.

The spelling of 43509841 in words is "forty-three million, five hundred nine thousand, eight hundred forty-one".