63738281 has 2 divisors, whose sum is σ = 63738282. Its totient is φ = 63738280.

The previous prime is 63738223. The next prime is 63738299. The reversal of 63738281 is 18283736.

It is a happy number.

63738281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54834025 + 8904256 = 7405^2 + 2984^2 .

It is a cyclic number.

It is not a de Polignac number, because 63738281 - 2¹⁸ = 63476137 is a prime.

It is a super-2 number, since 2×63738281² = 8125136929669922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (63738211) 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, 31869140 + 31869141.

It is an arithmetic number, because the mean of its divisors is an integer number (31869141).

Almost surely, 2^63738281 is an apocalyptic number.

It is an amenable number.

63738281 is a deficient number, since it is larger than the sum of its proper divisors (1).

63738281 is an equidigital number, since it uses as much as digits as its factorization.

63738281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 38.

The square root of 63738281 is about 7983.6258053594. The cubic root of 63738281 is about 399.4540071520.

The spelling of 63738281 in words is "sixty-three million, seven hundred thirty-eight thousand, two hundred eighty-one".