2543653 has 4 divisors (see below), whose sum is σ = 2907040. Its totient is φ = 2180268.

The previous prime is 2543647. The next prime is 2543657. The reversal of 2543653 is 3563452.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2543653 - 2⁵ = 2543621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2543657) 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, 181683 + ... + 181696.

It is an arithmetic number, because the mean of its divisors is an integer number (726760).

2^2543653 is an apocalyptic number.

It is an amenable number.

2543653 is a deficient number, since it is larger than the sum of its proper divisors (363387).

2543653 is an equidigital number, since it uses as much as digits as its factorization.

2543653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363386.

The product of its digits is 10800, while the sum is 28.

The square root of 2543653 is about 1594.8833813166. The cubic root of 2543653 is about 136.5062769099.

The spelling of 2543653 in words is "two million, five hundred forty-three thousand, six hundred fifty-three".