443685139 has 2 divisors, whose sum is σ = 443685140. Its totient is φ = 443685138.

The previous prime is 443685107. The next prime is 443685161. The reversal of 443685139 is 931586344.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 443685139 - 2⁵ = 443685107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 443685095 and 443685104.

It is not a weakly prime, because it can be changed into another prime (443685199) 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, 221842569 + 221842570.

It is an arithmetic number, because the mean of its divisors is an integer number (221842570).

Almost surely, 2^443685139 is an apocalyptic number.

443685139 is a deficient number, since it is larger than the sum of its proper divisors (1).

443685139 is an equidigital number, since it uses as much as digits as its factorization.

443685139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 43.

The square root of 443685139 is about 21063.8348597780. The cubic root of 443685139 is about 762.7079867632.

The spelling of 443685139 in words is "four hundred forty-three million, six hundred eighty-five thousand, one hundred thirty-nine".