1806089 has 2 divisors, whose sum is σ = 1806090. Its totient is φ = 1806088.

The previous prime is 1806061. The next prime is 1806107. The reversal of 1806089 is 9806081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1646089 + 160000 = 1283^2 + 400^2 .

It is an emirp because it is prime and its reverse (9806081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1806089 - 2⁸ = 1805833 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1806059) 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, 903044 + 903045.

It is an arithmetic number, because the mean of its divisors is an integer number (903045).

2^1806089 is an apocalyptic number.

It is an amenable number.

1806089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1806089 is an equidigital number, since it uses as much as digits as its factorization.

1806089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 1806089 is about 1343.9081069776. The cubic root of 1806089 is about 121.7810504537.

The spelling of 1806089 in words is "one million, eight hundred six thousand, eighty-nine".