2065999 has 4 divisors (see below), whose sum is σ = 2224936. Its totient is φ = 1907064.

The previous prime is 2065997. The next prime is 2066017. The reversal of 2065999 is 9995602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9995602 = 2 ⋅4997801.

It is a cyclic number.

It is not a de Polignac number, because 2065999 - 2¹ = 2065997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2065991) 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 in 3 ways as a sum of consecutive naturals, for example, 79449 + ... + 79474.

It is an arithmetic number, because the mean of its divisors is an integer number (556234).

2^2065999 is an apocalyptic number.

2065999 is a deficient number, since it is larger than the sum of its proper divisors (158937).

2065999 is a wasteful number, since it uses less digits than its factorization.

2065999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158936.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 2065999 is about 1437.3583408462. The cubic root of 2065999 is about 127.3630260393.

The spelling of 2065999 in words is "two million, sixty-five thousand, nine hundred ninety-nine".