2009687 has 8 divisors (see below), whose sum is σ = 2128560. Its totient is φ = 1897416.

The previous prime is 2009669. The next prime is 2009713. The reversal of 2009687 is 7869002.

It is not a de Polignac number, because 2009687 - 2¹⁰ = 2008663 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 (2009647) 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 7 ways as a sum of consecutive naturals, for example, 6713 + ... + 7005.

It is an arithmetic number, because the mean of its divisors is an integer number (266070).

2^2009687 is an apocalyptic number.

2009687 is a deficient number, since it is larger than the sum of its proper divisors (118873).

2009687 is an frugal number, since it uses more digits than its factorization.

2009687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350 (or 312 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 2009687 is about 1417.6342969892. The cubic root of 2009687 is about 126.1951917115.

The spelling of 2009687 in words is "two million, nine thousand, six hundred eighty-seven".