2649563 has 4 divisors (see below), whose sum is σ = 3028080. Its totient is φ = 2271048.

The previous prime is 2649557. The next prime is 2649587. The reversal of 2649563 is 3659462.

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

It is a cyclic number.

It is not a de Polignac number, because 2649563 - 2⁴ = 2649547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2649503) 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 3 ways as a sum of consecutive naturals, for example, 189248 + ... + 189261.

It is an arithmetic number, because the mean of its divisors is an integer number (757020).

2^2649563 is an apocalyptic number.

2649563 is a deficient number, since it is larger than the sum of its proper divisors (378517).

2649563 is an equidigital number, since it uses as much as digits as its factorization.

2649563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378516.

The product of its digits is 38880, while the sum is 35.

The square root of 2649563 is about 1627.7478305929. The cubic root of 2649563 is about 138.3751432467.

The spelling of 2649563 in words is "two million, six hundred forty-nine thousand, five hundred sixty-three".