1864589 has 2 divisors, whose sum is σ = 1864590. Its totient is φ = 1864588.

The previous prime is 1864571. The next prime is 1864591. The reversal of 1864589 is 9854681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1155625 + 708964 = 1075^2 + 842^2 .

It is an emirp because it is prime and its reverse (9854681) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1864589 is a prime.

It is a Sophie Germain prime.

Together with 1864591, 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 (1864529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 932294 + 932295.

It is an arithmetic number, because the mean of its divisors is an integer number (932295).

2^1864589 is an apocalyptic number.

It is an amenable number.

1864589 is a deficient number, since it is larger than the sum of its proper divisors (1).

1864589 is an equidigital number, since it uses as much as digits as its factorization.

1864589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 41.

The square root of 1864589 is about 1365.4995422921. The cubic root of 1864589 is about 123.0819512469.

The spelling of 1864589 in words is "one million, eight hundred sixty-four thousand, five hundred eighty-nine".