2643923 has 8 divisors (see below), whose sum is σ = 2723040. Its totient is φ = 2566080.

The previous prime is 2643917. The next prime is 2643943. The reversal of 2643923 is 3293462.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2643923 - 2¹² = 2639827 is a prime.

It is a d-powerful number, because it can be written as 2¹⁹ + 6² + 4² + 3⁵ + 9³ + 2¹⁹ + 3¹³ .

It is not an unprimeable number, because it can be changed into a prime (2643913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5186 + ... + 5672.

It is an arithmetic number, because the mean of its divisors is an integer number (340380).

2^2643923 is an apocalyptic number.

2643923 is a deficient number, since it is larger than the sum of its proper divisors (79117).

2643923 is an equidigital number, since it uses as much as digits as its factorization.

2643923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637.

The product of its digits is 7776, while the sum is 29.

The square root of 2643923 is about 1626.0144525803. The cubic root of 2643923 is about 138.2768892802.

It can be divided in two parts, 26439 and 23, that added together give a palindrome (26462).

The spelling of 2643923 in words is "two million, six hundred forty-three thousand, nine hundred twenty-three".