2543843 has 2 divisors, whose sum is σ = 2543844. Its totient is φ = 2543842.

The previous prime is 2543833. The next prime is 2543873. The reversal of 2543843 is 3483452.

2543843 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2543843 - 2²⁰ = 1495267 is a prime.

It is a super-2 number, since 2×2543843² = 12942274417298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2543813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1271921 + 1271922.

It is an arithmetic number, because the mean of its divisors is an integer number (1271922).

2^2543843 is an apocalyptic number.

2543843 is a deficient number, since it is larger than the sum of its proper divisors (1).

2543843 is an equidigital number, since it uses as much as digits as its factorization.

2543843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 29.

The square root of 2543843 is about 1594.9429456880. The cubic root of 2543843 is about 136.5096756370.

The spelling of 2543843 in words is "two million, five hundred forty-three thousand, eight hundred forty-three".