63944161 has 2 divisors, whose sum is σ = 63944162. Its totient is φ = 63944160.

The previous prime is 63944147. The next prime is 63944171. The reversal of 63944161 is 16144936.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49617936 + 14326225 = 7044^2 + 3785^2 .

It is a cyclic number.

It is not a de Polignac number, because 63944161 - 2¹¹ = 63942113 is a prime.

It is not a weakly prime, because it can be changed into another prime (63944171) 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, 31972080 + 31972081.

It is an arithmetic number, because the mean of its divisors is an integer number (31972081).

Almost surely, 2^63944161 is an apocalyptic number.

It is an amenable number.

63944161 is a deficient number, since it is larger than the sum of its proper divisors (1).

63944161 is an equidigital number, since it uses as much as digits as its factorization.

63944161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 34.

The square root of 63944161 is about 7996.5093009388. The cubic root of 63944161 is about 399.8836349012.

The spelling of 63944161 in words is "sixty-three million, nine hundred forty-four thousand, one hundred sixty-one".