2185999 has 2 divisors, whose sum is σ = 2186000. Its totient is φ = 2185998.

The previous prime is 2185987. The next prime is 2186003. The reversal of 2185999 is 9995812.

2185999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2185999 - 2⁷ = 2185871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2185919) 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, 1092999 + 1093000.

It is an arithmetic number, because the mean of its divisors is an integer number (1093000).

2^2185999 is an apocalyptic number.

2185999 is a deficient number, since it is larger than the sum of its proper divisors (1).

2185999 is an equidigital number, since it uses as much as digits as its factorization.

2185999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 43.

The square root of 2185999 is about 1478.5124280844. The cubic root of 2185999 is about 129.7826545768.

The spelling of 2185999 in words is "two million, one hundred eighty-five thousand, nine hundred ninety-nine".