443 has 2 divisors, whose sum is σ = 444. Its totient is φ = 442.

The previous prime is 439. The next prime is 449. The reversal of 443 is 344.

Adding to 443 its sum of digits (11), we get a palindrome (454).

Adding to 443 its reverse (344), we get a palindrome (787).

Subtracting from 443 its reverse (344), we obtain a palindrome (99).

443 is nontrivially palindromic in base 2 and base 11.

443 is an esthetic number in base 4, because in such base its adjacent digits differ by 1.

It is a weak prime.

443 is a truncatable prime.

It is a cyclic number.

It is not a de Polignac number, because 443 - 2^{2} = 439 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a magnanimous number.

443 is an undulating number in base 11.

It is a plaindrome in base 14 and base 16.

It is a nialpdrome in base 9 and base 10.

It is an inconsummate number, since it does not exist a number *n* which divided by its sum of digits gives 443.

It is not a weakly prime, because it can be changed into another prime (449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221 + 222.

It is an arithmetic number, because the mean of its divisors is an integer number (222).

2^{443} is an apocalyptic number.

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

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

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

The product of its digits is 48, while the sum is 11.

The square root of 443 is about 21.0475651798. The cubic root of 443 is about 7.6231519305.

The spelling of 443 in words is "four hundred forty-three", and thus it is an aban number and an iban number.

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