63643117 has 2 divisors, whose sum is σ = 63643118. Its totient is φ = 63643116.

The previous prime is 63643109. The next prime is 63643157. The reversal of 63643117 is 71134636.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63536841 + 106276 = 7971^2 + 326^2 .

It is a cyclic number.

It is not a de Polignac number, because 63643117 - 2³ = 63643109 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63643157) 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, 31821558 + 31821559.

It is an arithmetic number, because the mean of its divisors is an integer number (31821559).

Almost surely, 2^63643117 is an apocalyptic number.

It is an amenable number.

63643117 is a deficient number, since it is larger than the sum of its proper divisors (1).

63643117 is an equidigital number, since it uses as much as digits as its factorization.

63643117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 31.

The square root of 63643117 is about 7977.6636304121. The cubic root of 63643117 is about 399.2551074488.

The spelling of 63643117 in words is "sixty-three million, six hundred forty-three thousand, one hundred seventeen".