43944361 has 2 divisors, whose sum is σ = 43944362. Its totient is φ = 43944360.

The previous prime is 43944353. The next prime is 43944377. The reversal of 43944361 is 16344934.

43944361 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., 39187600 + 4756761 = 6260^2 + 2181^2 .

It is a cyclic number.

It is not a de Polignac number, because 43944361 - 2³ = 43944353 is a prime.

It is a super-2 number, since 2×43944361² = 3862213727396642, which contains 22 as substring.

It is equal to p_2658166 and since 43944361 and 2658166 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 (43944961) 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, 21972180 + 21972181.

It is an arithmetic number, because the mean of its divisors is an integer number (21972181).

Almost surely, 2^43944361 is an apocalyptic number.

It is an amenable number.

43944361 is a deficient number, since it is larger than the sum of its proper divisors (1).

43944361 is an equidigital number, since it uses as much as digits as its factorization.

43944361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 34.

The square root of 43944361 is about 6629.0543066112. The cubic root of 43944361 is about 352.8859639084.

The spelling of 43944361 in words is "forty-three million, nine hundred forty-four thousand, three hundred sixty-one".