4543993 has 2 divisors, whose sum is σ = 4543994. Its totient is φ = 4543992.

The previous prime is 4543991. The next prime is 4544009. The reversal of 4543993 is 3993454.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4507129 + 36864 = 2123^2 + 192^2 .

It is a cyclic number.

It is not a de Polignac number, because 4543993 - 2¹ = 4543991 is a prime.

Together with 4543991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (4543991) 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 as a sum of consecutive naturals, namely, 2271996 + 2271997.

It is an arithmetic number, because the mean of its divisors is an integer number (2271997).

Almost surely, 2^4543993 is an apocalyptic number.

It is an amenable number.

4543993 is a deficient number, since it is larger than the sum of its proper divisors (1).

4543993 is an equidigital number, since it uses as much as digits as its factorization.

4543993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 37.

The square root of 4543993 is about 2131.6643732070. The cubic root of 4543993 is about 165.6326249249.

The spelling of 4543993 in words is "four million, five hundred forty-three thousand, nine hundred ninety-three".