Search a number
-
+
2000009 = 11216529
BaseRepresentation
bin111101000010010001001
310202121111102
413220102021
51003000014
6110511145
722666634
oct7502211
93677442
102000009
111146700
128054b5
1355044b
143a0c1b
152978de
hex1e8489

2000009 has 6 divisors (see below), whose sum is σ = 2198490. Its totient is φ = 1818080.

The previous prime is 2000003. The next prime is 2000029. The reversal of 2000009 is 9000002.

It can be written as a sum of positive squares in only one way, i.e., 1951609 + 48400 = 1397^2 + 220^2 .

It is not a de Polignac number, because 2000009 - 24 = 1999993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (11).

It is a Duffinian number.

2000009 is a modest number, since divided by 9 gives 2 as remainder.

It is not an unprimeable number, because it can be changed into a prime (2000003) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8144 + ... + 8385.

It is an arithmetic number, because the mean of its divisors is an integer number (366415).

22000009 is an apocalyptic number.

It is an amenable number.

2000009 is a deficient number, since it is larger than the sum of its proper divisors (198481).

2000009 is a wasteful number, since it uses less digits than its factorization.

2000009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16551 (or 16540 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 2000009 is about 1414.2167443500. The cubic root of 2000009 is about 125.9922939774.

Subtracting from 2000009 its product of nonzero digits (18), we obtain a palindrome (1999991).

Adding to 2000009 its reverse (9000002), we get a palindrome (11000011).

The spelling of 2000009 in words is "two million, nine", and thus it is an aban number and an uban number.

Divisors: 1 11 121 16529 181819 2000009