2009611 has 4 divisors (see below), whose sum is σ = 2115400. Its totient is φ = 1903824.

The previous prime is 2009603. The next prime is 2009639. The reversal of 2009611 is 1169002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2009611 - 2³ = 2009603 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 105769 = 2009611 / (2 + 0 + 0 + 9 + 6 + 1 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2009011) 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 in 3 ways as a sum of consecutive naturals, for example, 52866 + ... + 52903.

It is an arithmetic number, because the mean of its divisors is an integer number (528850).

2^2009611 is an apocalyptic number.

2009611 is a deficient number, since it is larger than the sum of its proper divisors (105789).

2009611 is a wasteful number, since it uses less digits than its factorization.

2009611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105788.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 2009611 is about 1417.6074915152. The cubic root of 2009611 is about 126.1936009239.

The spelling of 2009611 in words is "two million, nine thousand, six hundred eleven".