43639241 has 2 divisors, whose sum is σ = 43639242. Its totient is φ = 43639240.

The previous prime is 43639223. The next prime is 43639247. The reversal of 43639241 is 14293634.

43639241 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., 32775625 + 10863616 = 5725^2 + 3296^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43639241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43639198 and 43639207.

It is not a weakly prime, because it can be changed into another prime (43639247) 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, 21819620 + 21819621.

It is an arithmetic number, because the mean of its divisors is an integer number (21819621).

Almost surely, 2^43639241 is an apocalyptic number.

It is an amenable number.

43639241 is a deficient number, since it is larger than the sum of its proper divisors (1).

43639241 is an equidigital number, since it uses as much as digits as its factorization.

43639241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 32.

The square root of 43639241 is about 6606.0003784438. Note that the first 3 decimals coincide. The cubic root of 43639241 is about 352.0673322685.

The spelling of 43639241 in words is "forty-three million, six hundred thirty-nine thousand, two hundred forty-one".