438444847 has 2 divisors, whose sum is σ = 438444848. Its totient is φ = 438444846.

The previous prime is 438444829. The next prime is 438444869. The reversal of 438444847 is 748444834.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 438444847 - 2⁷ = 438444719 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 438444797 and 438444806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (438442847) 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, 219222423 + 219222424.

It is an arithmetic number, because the mean of its divisors is an integer number (219222424).

Almost surely, 2^438444847 is an apocalyptic number.

438444847 is a deficient number, since it is larger than the sum of its proper divisors (1).

438444847 is an equidigital number, since it uses as much as digits as its factorization.

438444847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1376256, while the sum is 46.

The square root of 438444847 is about 20939.0746452655. The cubic root of 438444847 is about 759.6933475458.

The spelling of 438444847 in words is "four hundred thirty-eight million, four hundred forty-four thousand, eight hundred forty-seven".