2643423 has 4 divisors (see below), whose sum is σ = 3524568. Its totient is φ = 1762280.

The previous prime is 2643397. The next prime is 2643427. The reversal of 2643423 is 3243462.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2643423 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 2643393 and 2643402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2643427) 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, 440568 + ... + 440573.

It is an arithmetic number, because the mean of its divisors is an integer number (881142).

2^2643423 is an apocalyptic number.

2643423 is a deficient number, since it is larger than the sum of its proper divisors (881145).

2643423 is an equidigital number, since it uses as much as digits as its factorization.

2643423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881144.

The product of its digits is 3456, while the sum is 24.

The square root of 2643423 is about 1625.8606951397. The cubic root of 2643423 is about 138.2681720818.

Adding to 2643423 its reverse (3243462), we get a palindrome (5886885).

The spelling of 2643423 in words is "two million, six hundred forty-three thousand, four hundred twenty-three".