443440139 has 2 divisors, whose sum is σ = 443440140. Its totient is φ = 443440138.

The previous prime is 443440117. The next prime is 443440157. The reversal of 443440139 is 931044344.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 443440139 - 2¹² = 443436043 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (443440339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221720069 + 221720070.

It is an arithmetic number, because the mean of its divisors is an integer number (221720070).

Almost surely, 2^443440139 is an apocalyptic number.

443440139 is a deficient number, since it is larger than the sum of its proper divisors (1).

443440139 is an equidigital number, since it uses as much as digits as its factorization.

443440139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 443440139 is about 21058.0184015496. The cubic root of 443440139 is about 762.5675734793.

The spelling of 443440139 in words is "four hundred forty-three million, four hundred forty thousand, one hundred thirty-nine".