2009655 has 48 divisors (see below), whose sum is σ = 3841344. Its totient is φ = 967680.

The previous prime is 2009647. The next prime is 2009669. The reversal of 2009655 is 5569002.

2009655 is a `hidden beast` number, since 2 + 0 + 0 + 9 + 655 = 666.

It is not a de Polignac number, because 2009655 - 2³ = 2009647 is a prime.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 28270 + ... + 28340.

It is an arithmetic number, because the mean of its divisors is an integer number (80028).

2^2009655 is an apocalyptic number.

2009655 is a deficient number, since it is larger than the sum of its proper divisors (1831689).

2009655 is a wasteful number, since it uses less digits than its factorization.

2009655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 2009655 is about 1417.6230105356. The cubic root of 2009655 is about 126.1945219111.

The spelling of 2009655 in words is "two million, nine thousand, six hundred fifty-five".