2209653 has 8 divisors (see below), whose sum is σ = 3273600. Its totient is φ = 1473084.

The previous prime is 2209639. The next prime is 2209661. The reversal of 2209653 is 3569022.

2209653 is a `hidden beast` number, since 2 + 2 + 0 + 9 + 653 = 666.

It is not a de Polignac number, because 2209653 - 2⁶ = 2209589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 81839 = 2209653 / (2 + 2 + 0 + 9 + 6 + 5 + 3).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2209663) 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, 40893 + ... + 40946.

It is an arithmetic number, because the mean of its divisors is an integer number (409200).

2^2209653 is an apocalyptic number.

It is an amenable number.

2209653 is a deficient number, since it is larger than the sum of its proper divisors (1063947).

2209653 is an equidigital number, since it uses as much as digits as its factorization.

2209653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81848 (or 81842 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 2209653 is about 1486.4901614205. The cubic root of 2209653 is about 130.2490885003.

The spelling of 2209653 in words is "two million, two hundred nine thousand, six hundred fifty-three".