438855647 has 2 divisors, whose sum is σ = 438855648. Its totient is φ = 438855646.

The previous prime is 438855643. The next prime is 438855661. The reversal of 438855647 is 746558834.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 438855647 - 2² = 438855643 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 438855595 and 438855604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (438855643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219427823 + 219427824.

It is an arithmetic number, because the mean of its divisors is an integer number (219427824).

Almost surely, 2^438855647 is an apocalyptic number.

438855647 is a deficient number, since it is larger than the sum of its proper divisors (1).

438855647 is an equidigital number, since it uses as much as digits as its factorization.

438855647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3225600, while the sum is 50.

The square root of 438855647 is about 20948.8817601322. The cubic root of 438855647 is about 759.9305378574.

The spelling of 438855647 in words is "four hundred thirty-eight million, eight hundred fifty-five thousand, six hundred forty-seven".