43943489 has 2 divisors, whose sum is σ = 43943490. Its totient is φ = 43943488.

The previous prime is 43943443. The next prime is 43943507. The reversal of 43943489 is 98434934.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41383489 + 2560000 = 6433^2 + 1600^2 .

It is a cyclic number.

It is not a de Polignac number, because 43943489 - 2⁸ = 43943233 is a prime.

It is not a weakly prime, because it can be changed into another prime (43943189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21971744 + 21971745.

It is an arithmetic number, because the mean of its divisors is an integer number (21971745).

Almost surely, 2^43943489 is an apocalyptic number.

It is an amenable number.

43943489 is a deficient number, since it is larger than the sum of its proper divisors (1).

43943489 is an equidigital number, since it uses as much as digits as its factorization.

43943489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 44.

The square root of 43943489 is about 6628.9885352141. The cubic root of 43943489 is about 352.8836297554.

It can be divided in two parts, 4 and 3943489, that added together give a palindrome (3943493).

The spelling of 43943489 in words is "forty-three million, nine hundred forty-three thousand, four hundred eighty-nine".