43440961 has 2 divisors, whose sum is σ = 43440962. Its totient is φ = 43440960.

The previous prime is 43440959. The next prime is 43440977. The reversal of 43440961 is 16904434.

43440961 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., 24561936 + 18879025 = 4956^2 + 4345^2 .

It is a cyclic number.

It is not a de Polignac number, because 43440961 - 2¹ = 43440959 is a prime.

Together with 43440959, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_2629606 and since 43440961 and 2629606 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (43440911) 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, 21720480 + 21720481.

It is an arithmetic number, because the mean of its divisors is an integer number (21720481).

Almost surely, 2^43440961 is an apocalyptic number.

It is an amenable number.

43440961 is a deficient number, since it is larger than the sum of its proper divisors (1).

43440961 is an equidigital number, since it uses as much as digits as its factorization.

43440961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 43440961 is about 6590.9757244281. The cubic root of 43440961 is about 351.5333029290.

The spelling of 43440961 in words is "forty-three million, four hundred forty thousand, nine hundred sixty-one".