43640341 has 2 divisors, whose sum is σ = 43640342. Its totient is φ = 43640340.

The previous prime is 43640339. The next prime is 43640351. The reversal of 43640341 is 14304634.

It is a happy number.

43640341 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24900100 + 18740241 = 4990^2 + 4329^2 .

It is a cyclic number.

It is not a de Polignac number, because 43640341 - 2¹ = 43640339 is a prime.

Together with 43640339, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43640351) 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, 21820170 + 21820171.

It is an arithmetic number, because the mean of its divisors is an integer number (21820171).

Almost surely, 2^43640341 is an apocalyptic number.

It is an amenable number.

43640341 is a deficient number, since it is larger than the sum of its proper divisors (1).

43640341 is an equidigital number, since it uses as much as digits as its factorization.

43640341 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 43640341 is about 6606.0836355590. The cubic root of 43640341 is about 352.0702903921.

Adding to 43640341 its reverse (14304634), we get a palindrome (57944975).

It can be divided in two parts, 43640 and 341, that multiplied together give a triangular number (14881240 = T₅₄₅₅).

The spelling of 43640341 in words is "forty-three million, six hundred forty thousand, three hundred forty-one".