63944171 has 2 divisors, whose sum is σ = 63944172. Its totient is φ = 63944170.

The previous prime is 63944161. The next prime is 63944173. The reversal of 63944171 is 17144936.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63944171 - 2¹⁸ = 63682027 is a prime.

Together with 63944173, 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 (63944173) 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, 31972085 + 31972086.

It is an arithmetic number, because the mean of its divisors is an integer number (31972086).

Almost surely, 2^63944171 is an apocalyptic number.

63944171 is a deficient number, since it is larger than the sum of its proper divisors (1).

63944171 is an equidigital number, since it uses as much as digits as its factorization.

63944171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 35.

The square root of 63944171 is about 7996.5099262116. The cubic root of 63944171 is about 399.8836557467.

The spelling of 63944171 in words is "sixty-three million, nine hundred forty-four thousand, one hundred seventy-one".