2009547 has 6 divisors (see below), whose sum is σ = 2902692. Its totient is φ = 1339692.

The previous prime is 2009543. The next prime is 2009593. The reversal of 2009547 is 7459002.

It is not a de Polignac number, because 2009547 - 2² = 2009543 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2009547.

It is not an unprimeable number, because it can be changed into a prime (2009543) 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 5 ways as a sum of consecutive naturals, for example, 111633 + ... + 111650.

It is an arithmetic number, because the mean of its divisors is an integer number (483782).

2^2009547 is an apocalyptic number.

2009547 is a deficient number, since it is larger than the sum of its proper divisors (893145).

2009547 is a wasteful number, since it uses less digits than its factorization.

2009547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223289 (or 223286 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 2009547 is about 1417.5849180913. The cubic root of 2009547 is about 126.1922612822.

It can be divided in two parts, 2009 and 547, that added together give a triangular number (2556 = T₇₁).

The spelling of 2009547 in words is "two million, nine thousand, five hundred forty-seven".