438464647 has 2 divisors, whose sum is σ = 438464648. Its totient is φ = 438464646.

The previous prime is 438464639. The next prime is 438464657. The reversal of 438464647 is 746464834.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 438464647 - 2³ = 438464639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 438464597 and 438464606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (438464657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219232323 + 219232324.

It is an arithmetic number, because the mean of its divisors is an integer number (219232324).

Almost surely, 2^438464647 is an apocalyptic number.

438464647 is a deficient number, since it is larger than the sum of its proper divisors (1).

438464647 is an equidigital number, since it uses as much as digits as its factorization.

438464647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1548288, while the sum is 46.

The square root of 438464647 is about 20939.5474401908. The cubic root of 438464647 is about 759.7047831931.

The spelling of 438464647 in words is "four hundred thirty-eight million, four hundred sixty-four thousand, six hundred forty-seven".