43389589 has 2 divisors, whose sum is σ = 43389590. Its totient is φ = 43389588.

The previous prime is 43389587. The next prime is 43389613. The reversal of 43389589 is 98598334.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40640625 + 2748964 = 6375^2 + 1658^2 .

It is a cyclic number.

It is not a de Polignac number, because 43389589 - 2¹ = 43389587 is a prime.

Together with 43389587, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43389587) 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, 21694794 + 21694795.

It is an arithmetic number, because the mean of its divisors is an integer number (21694795).

Almost surely, 2^43389589 is an apocalyptic number.

It is an amenable number.

43389589 is a deficient number, since it is larger than the sum of its proper divisors (1).

43389589 is an equidigital number, since it uses as much as digits as its factorization.

43389589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 49.

The square root of 43389589 is about 6587.0774247765. The cubic root of 43389589 is about 351.3946772957.

The spelling of 43389589 in words is "forty-three million, three hundred eighty-nine thousand, five hundred eighty-nine".