43968389 has 2 divisors, whose sum is σ = 43968390. Its totient is φ = 43968388.

The previous prime is 43968377. The next prime is 43968439. The reversal of 43968389 is 98386934.

It is an a-pointer prime, because the next prime (43968439) can be obtained adding 43968389 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22420225 + 21548164 = 4735^2 + 4642^2 .

It is a cyclic number.

It is not a de Polignac number, because 43968389 - 2²⁰ = 42919813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43968329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21984194 + 21984195.

It is an arithmetic number, because the mean of its divisors is an integer number (21984195).

Almost surely, 2^43968389 is an apocalyptic number.

It is an amenable number.

43968389 is a deficient number, since it is larger than the sum of its proper divisors (1).

43968389 is an equidigital number, since it uses as much as digits as its factorization.

43968389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1119744, while the sum is 50.

The square root of 43968389 is about 6630.8663838144. The cubic root of 43968389 is about 352.9502694591.

The spelling of 43968389 in words is "forty-three million, nine hundred sixty-eight thousand, three hundred eighty-nine".