63685117 has 2 divisors, whose sum is σ = 63685118. Its totient is φ = 63685116.

The previous prime is 63685087. The next prime is 63685121. The reversal of 63685117 is 71158636.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54081316 + 9603801 = 7354^2 + 3099^2 .

It is a cyclic number.

It is not a de Polignac number, because 63685117 - 2⁷ = 63684989 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 (63685147) 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, 31842558 + 31842559.

It is an arithmetic number, because the mean of its divisors is an integer number (31842559).

Almost surely, 2^63685117 is an apocalyptic number.

It is an amenable number.

63685117 is a deficient number, since it is larger than the sum of its proper divisors (1).

63685117 is an equidigital number, since it uses as much as digits as its factorization.

63685117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 63685117 is about 7980.2955459056. The cubic root of 63685117 is about 399.3429149391.

The spelling of 63685117 in words is "sixty-three million, six hundred eighty-five thousand, one hundred seventeen".