43975289 has 2 divisors, whose sum is σ = 43975290. Its totient is φ = 43975288.

The previous prime is 43975279. The next prime is 43975297. The reversal of 43975289 is 98257934.

It is a happy number.

43975289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25200400 + 18774889 = 5020^2 + 4333^2 .

It is a cyclic number.

It is not a de Polignac number, because 43975289 - 2¹⁶ = 43909753 is a prime.

It is not a weakly prime, because it can be changed into another prime (43975279) 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, 21987644 + 21987645.

It is an arithmetic number, because the mean of its divisors is an integer number (21987645).

Almost surely, 2^43975289 is an apocalyptic number.

It is an amenable number.

43975289 is a deficient number, since it is larger than the sum of its proper divisors (1).

43975289 is an equidigital number, since it uses as much as digits as its factorization.

43975289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 47.

The square root of 43975289 is about 6631.3866574043. The cubic root of 43975289 is about 352.9687314309.

The spelling of 43975289 in words is "forty-three million, nine hundred seventy-five thousand, two hundred eighty-nine".