438838243 has 2 divisors, whose sum is σ = 438838244. Its totient is φ = 438838242.

The previous prime is 438838171. The next prime is 438838249. The reversal of 438838243 is 342838834.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438838243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 438838243.

It is not a weakly prime, because it can be changed into another prime (438838249) 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, 219419121 + 219419122.

It is an arithmetic number, because the mean of its divisors is an integer number (219419122).

Almost surely, 2^438838243 is an apocalyptic number.

438838243 is a deficient number, since it is larger than the sum of its proper divisors (1).

438838243 is an equidigital number, since it uses as much as digits as its factorization.

438838243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 442368, while the sum is 43.

The square root of 438838243 is about 20948.4663639131. The cubic root of 438838243 is about 759.9204920288.

The spelling of 438838243 in words is "four hundred thirty-eight million, eight hundred thirty-eight thousand, two hundred forty-three".