63663109 has 2 divisors, whose sum is σ = 63663110. Its totient is φ = 63663108.

The previous prime is 63663107. The next prime is 63663121. The reversal of 63663109 is 90136636.

It is a happy number.

63663109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62062884 + 1600225 = 7878^2 + 1265^2 .

It is a cyclic number.

It is not a de Polignac number, because 63663109 - 2¹ = 63663107 is a prime.

Together with 63663107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63663101) 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, 31831554 + 31831555.

It is an arithmetic number, because the mean of its divisors is an integer number (31831555).

Almost surely, 2^63663109 is an apocalyptic number.

It is an amenable number.

63663109 is a deficient number, since it is larger than the sum of its proper divisors (1).

63663109 is an equidigital number, since it uses as much as digits as its factorization.

63663109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 34.

The square root of 63663109 is about 7978.9165304570. The cubic root of 63663109 is about 399.2969086304.

The spelling of 63663109 in words is "sixty-three million, six hundred sixty-three thousand, one hundred nine".