2623643 has 6 divisors (see below), whose sum is σ = 2883972. Its totient is φ = 2385020.

The previous prime is 2623639. The next prime is 2623651. The reversal of 2623643 is 3463262.

It is not a de Polignac number, because 2623643 - 2² = 2623639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2623343) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10721 + ... + 10962.

It is an arithmetic number, because the mean of its divisors is an integer number (480662).

2^2623643 is an apocalyptic number.

2623643 is a deficient number, since it is larger than the sum of its proper divisors (260329).

2623643 is a wasteful number, since it uses less digits than its factorization.

2623643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21705 (or 21694 counting only the distinct ones).

The product of its digits is 5184, while the sum is 26.

The square root of 2623643 is about 1619.7663411739. The cubic root of 2623643 is about 137.9224341814.

The spelling of 2623643 in words is "two million, six hundred twenty-three thousand, six hundred forty-three".