443740013 has 2 divisors, whose sum is σ = 443740014. Its totient is φ = 443740012.

The previous prime is 443739997. The next prime is 443740043. The reversal of 443740013 is 310047344.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 419553289 + 24186724 = 20483^2 + 4918^2 .

It is a cyclic number.

It is not a de Polignac number, because 443740013 - 2⁴ = 443739997 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (443740043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221870006 + 221870007.

It is an arithmetic number, because the mean of its divisors is an integer number (221870007).

Almost surely, 2^443740013 is an apocalyptic number.

It is an amenable number.

443740013 is a deficient number, since it is larger than the sum of its proper divisors (1).

443740013 is an equidigital number, since it uses as much as digits as its factorization.

443740013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 443740013 is about 21065.1373838387. The cubic root of 443740013 is about 762.7394288146.

Adding to 443740013 its reverse (310047344), we get a palindrome (753787357).

The spelling of 443740013 in words is "four hundred forty-three million, seven hundred forty thousand, thirteen".