438223859 has 2 divisors, whose sum is σ = 438223860. Its totient is φ = 438223858.

The previous prime is 438223813. The next prime is 438223861. The reversal of 438223859 is 958322834.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438223859 is a prime.

Together with 438223861, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (438223889) 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, 219111929 + 219111930.

It is an arithmetic number, because the mean of its divisors is an integer number (219111930).

Almost surely, 2^438223859 is an apocalyptic number.

438223859 is a deficient number, since it is larger than the sum of its proper divisors (1).

438223859 is an equidigital number, since it uses as much as digits as its factorization.

438223859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 414720, while the sum is 44.

The square root of 438223859 is about 20933.7970516579. The cubic root of 438223859 is about 759.5656907999.

The spelling of 438223859 in words is "four hundred thirty-eight million, two hundred twenty-three thousand, eight hundred fifty-nine".