1389589 has 2 divisors, whose sum is σ = 1389590. Its totient is φ = 1389588.

The previous prime is 1389587. The next prime is 1389623. The reversal of 1389589 is 9859831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 708964 + 680625 = 842^2 + 825^2 .

It is an emirp because it is prime and its reverse (9859831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1389589 - 2¹ = 1389587 is a prime.

Together with 1389587, 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 (1389587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694794 + 694795.

It is an arithmetic number, because the mean of its divisors is an integer number (694795).

2^1389589 is an apocalyptic number.

It is an amenable number.

1389589 is a deficient number, since it is larger than the sum of its proper divisors (1).

1389589 is an equidigital number, since it uses as much as digits as its factorization.

1389589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 43.

The square root of 1389589 is about 1178.8082965436. The cubic root of 1389589 is about 111.5909022958.

The spelling of 1389589 in words is "one million, three hundred eighty-nine thousand, five hundred eighty-nine".