1609589 has 2 divisors, whose sum is σ = 1609590. Its totient is φ = 1609588.

The previous prime is 1609583. The next prime is 1609627. The reversal of 1609589 is 9859061.

It is an a-pointer prime, because the next prime (1609627) can be obtained adding 1609589 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1562500 + 47089 = 1250^2 + 217^2 .

It is an emirp because it is prime and its reverse (9859061) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1609589 is a prime.

It is a Sophie Germain prime.

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 (1609583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 804794 + 804795.

It is an arithmetic number, because the mean of its divisors is an integer number (804795).

2^1609589 is an apocalyptic number.

It is an amenable number.

1609589 is a deficient number, since it is larger than the sum of its proper divisors (1).

1609589 is an equidigital number, since it uses as much as digits as its factorization.

1609589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 1609589 is about 1268.6957870191. The cubic root of 1609589 is about 117.1938976892.

The spelling of 1609589 in words is "one million, six hundred nine thousand, five hundred eighty-nine".