2009653 has 4 divisors (see below), whose sum is σ = 2024460. Its totient is φ = 1994848.

The previous prime is 2009647. The next prime is 2009669. The reversal of 2009653 is 3569002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1238769 + 770884 = 1113^2 + 878^2 .

It is a cyclic number.

It is not a de Polignac number, because 2009653 - 2¹⁷ = 1878581 is a prime.

It is a Duffinian number.

2009653 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2009603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7198 + ... + 7471.

It is an arithmetic number, because the mean of its divisors is an integer number (506115).

2^2009653 is an apocalyptic number.

It is an amenable number.

2009653 is a deficient number, since it is larger than the sum of its proper divisors (14807).

2009653 is a wasteful number, since it uses less digits than its factorization.

2009653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14806.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 2009653 is about 1417.6223051293. The cubic root of 2009653 is about 126.1944800484.

It can be divided in two parts, 2009 and 653, that added together give a palindrome (2662).

The spelling of 2009653 in words is "two million, nine thousand, six hundred fifty-three".