438229997 has 2 divisors, whose sum is σ = 438229998. Its totient is φ = 438229996.

The previous prime is 438229969. The next prime is 438229999. The reversal of 438229997 is 799922834.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220047556 + 218182441 = 14834^2 + 14771^2 .

It is a cyclic number.

It is not a de Polignac number, because 438229997 - 2¹² = 438225901 is a prime.

Together with 438229999, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (438229999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219114998 + 219114999.

It is an arithmetic number, because the mean of its divisors is an integer number (219114999).

Almost surely, 2^438229997 is an apocalyptic number.

It is an amenable number.

438229997 is a deficient number, since it is larger than the sum of its proper divisors (1).

438229997 is an equidigital number, since it uses as much as digits as its factorization.

438229997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 53.

The square root of 438229997 is about 20933.9436561772. The cubic root of 438229997 is about 759.5692370791.

The spelling of 438229997 in words is "four hundred thirty-eight million, two hundred twenty-nine thousand, nine hundred ninety-seven".