43965641 has 2 divisors, whose sum is σ = 43965642. Its totient is φ = 43965640.

The previous prime is 43965619. The next prime is 43965643. The reversal of 43965641 is 14656934.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32262400 + 11703241 = 5680^2 + 3421^2 .

It is a cyclic number.

It is not a de Polignac number, because 43965641 - 2⁶ = 43965577 is a prime.

Together with 43965643, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_2659439 and since 43965641 and 2659439 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 43965595 and 43965604.

It is not a weakly prime, because it can be changed into another prime (43965643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21982820 + 21982821.

It is an arithmetic number, because the mean of its divisors is an integer number (21982821).

Almost surely, 2^43965641 is an apocalyptic number.

It is an amenable number.

43965641 is a deficient number, since it is larger than the sum of its proper divisors (1).

43965641 is an equidigital number, since it uses as much as digits as its factorization.

43965641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 38.

The square root of 43965641 is about 6630.6591678354. The cubic root of 43965641 is about 352.9429162403.

The spelling of 43965641 in words is "forty-three million, nine hundred sixty-five thousand, six hundred forty-one".