63963281 has 2 divisors, whose sum is σ = 63963282. Its totient is φ = 63963280.

The previous prime is 63963227. The next prime is 63963293. The reversal of 63963281 is 18236936.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63043600 + 919681 = 7940^2 + 959^2 .

It is a cyclic number.

It is not a de Polignac number, because 63963281 - 2⁶ = 63963217 is a prime.

It is a super-2 number, since 2×63963281² = 8182602632569922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63963181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31981640 + 31981641.

It is an arithmetic number, because the mean of its divisors is an integer number (31981641).

Almost surely, 2^63963281 is an apocalyptic number.

It is an amenable number.

63963281 is a deficient number, since it is larger than the sum of its proper divisors (1).

63963281 is an equidigital number, since it uses as much as digits as its factorization.

63963281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 38.

The square root of 63963281 is about 7997.7047332344. The cubic root of 63963281 is about 399.9234874488.

The spelling of 63963281 in words is "sixty-three million, nine hundred sixty-three thousand, two hundred eighty-one".