438197671 has 2 divisors, whose sum is σ = 438197672. Its totient is φ = 438197670.

The previous prime is 438197663. The next prime is 438197677. The reversal of 438197671 is 176791834.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 438197671 - 2³ = 438197663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (438197677) 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, 219098835 + 219098836.

It is an arithmetic number, because the mean of its divisors is an integer number (219098836).

Almost surely, 2^438197671 is an apocalyptic number.

438197671 is a deficient number, since it is larger than the sum of its proper divisors (1).

438197671 is an equidigital number, since it uses as much as digits as its factorization.

438197671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 46.

The square root of 438197671 is about 20933.1715466147. The cubic root of 438197671 is about 759.5505600989.

The spelling of 438197671 in words is "four hundred thirty-eight million, one hundred ninety-seven thousand, six hundred seventy-one".