2543423 has 2 divisors, whose sum is σ = 2543424. Its totient is φ = 2543422.

The previous prime is 2543413. The next prime is 2543441. The reversal of 2543423 is 3243452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2543423 - 2¹⁰ = 2542399 is a prime.

It is a Sophie Germain prime.

It is a d-powerful number, because it can be written as 2⁷ + 5⁹ + 4² + 3⁸ + 4⁴ + 2¹⁹ + 3¹⁰ .

It is equal to p₁₈₆₀₁₇ and since 2543423 and 186017 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2543413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1271711 + 1271712.

It is an arithmetic number, because the mean of its divisors is an integer number (1271712).

2^2543423 is an apocalyptic number.

2543423 is a deficient number, since it is larger than the sum of its proper divisors (1).

2543423 is an equidigital number, since it uses as much as digits as its factorization.

2543423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 23.

The square root of 2543423 is about 1594.8112741011. The cubic root of 2543423 is about 136.5021624349.

Adding to 2543423 its reverse (3243452), we get a palindrome (5786875).

The spelling of 2543423 in words is "two million, five hundred forty-three thousand, four hundred twenty-three".