438897971 has 2 divisors, whose sum is σ = 438897972. Its totient is φ = 438897970.

The previous prime is 438897923. The next prime is 438898003. The reversal of 438897971 is 179798834.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438897971 is a prime.

It is not a weakly prime, because it can be changed into another prime (438897911) 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, 219448985 + 219448986.

It is an arithmetic number, because the mean of its divisors is an integer number (219448986).

Almost surely, 2^438897971 is an apocalyptic number.

438897971 is a deficient number, since it is larger than the sum of its proper divisors (1).

438897971 is an equidigital number, since it uses as much as digits as its factorization.

438897971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3048192, while the sum is 56.

The square root of 438897971 is about 20949.8919090290. The cubic root of 438897971 is about 759.9549667453.

The spelling of 438897971 in words is "four hundred thirty-eight million, eight hundred ninety-seven thousand, nine hundred seventy-one".