443845139 has 2 divisors, whose sum is σ = 443845140. Its totient is φ = 443845138.

The previous prime is 443845117. The next prime is 443845159. The reversal of 443845139 is 931548344.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 443845139 - 2¹⁶ = 443779603 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 443845096 and 443845105.

It is not a weakly prime, because it can be changed into another prime (443845109) 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, 221922569 + 221922570.

It is an arithmetic number, because the mean of its divisors is an integer number (221922570).

Almost surely, 2^443845139 is an apocalyptic number.

443845139 is a deficient number, since it is larger than the sum of its proper divisors (1).

443845139 is an equidigital number, since it uses as much as digits as its factorization.

443845139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 41.

The square root of 443845139 is about 21067.6324963200. The cubic root of 443845139 is about 762.7996573355.

The spelling of 443845139 in words is "four hundred forty-three million, eight hundred forty-five thousand, one hundred thirty-nine".