1138589 has 2 divisors, whose sum is σ = 1138590. Its totient is φ = 1138588.

The previous prime is 1138567. The next prime is 1138591. The reversal of 1138589 is 9858311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1138489 + 100 = 1067^2 + 10^2 .

It is an emirp because it is prime and its reverse (9858311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1138589 - 2¹⁶ = 1073053 is a prime.

It is a Sophie Germain prime.

Together with 1138591, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1138519) 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, 569294 + 569295.

It is an arithmetic number, because the mean of its divisors is an integer number (569295).

2^1138589 is an apocalyptic number.

It is an amenable number.

1138589 is a deficient number, since it is larger than the sum of its proper divisors (1).

1138589 is an equidigital number, since it uses as much as digits as its factorization.

1138589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 35.

The square root of 1138589 is about 1067.0468593272. The cubic root of 1138589 is about 104.4212756902.

The spelling of 1138589 in words is "one million, one hundred thirty-eight thousand, five hundred eighty-nine".