2644963 has 4 divisors (see below), whose sum is σ = 2682288. Its totient is φ = 2607640.

The previous prime is 2644927. The next prime is 2644981. The reversal of 2644963 is 3694462.

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 2644963 - 2⁹ = 2644451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2644903) 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, 18556 + ... + 18697.

It is an arithmetic number, because the mean of its divisors is an integer number (670572).

2^2644963 is an apocalyptic number.

2644963 is a deficient number, since it is larger than the sum of its proper divisors (37325).

2644963 is an equidigital number, since it uses as much as digits as its factorization.

2644963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37324.

The product of its digits is 31104, while the sum is 34.

The square root of 2644963 is about 1626.3342214932. The cubic root of 2644963 is about 138.2950175329.

The spelling of 2644963 in words is "two million, six hundred forty-four thousand, nine hundred sixty-three".