63708389317 has 2 divisors, whose sum is σ = 63708389318. Its totient is φ = 63708389316.

The previous prime is 63708389291. The next prime is 63708389369. The reversal of 63708389317 is 71398380736.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32940072036 + 30768317281 = 181494^2 + 175409^2 .

It is a cyclic number.

It is not a de Polignac number, because 63708389317 - 2²³ = 63700000709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63708389617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31854194658 + 31854194659.

It is an arithmetic number, because the mean of its divisors is an integer number (31854194659).

Almost surely, 2^63708389317 is an apocalyptic number.

It is an amenable number.

63708389317 is a deficient number, since it is larger than the sum of its proper divisors (1).

63708389317 is an equidigital number, since it uses as much as digits as its factorization.

63708389317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4572288, while the sum is 55.

The spelling of 63708389317 in words is "sixty-three billion, seven hundred eight million, three hundred eighty-nine thousand, three hundred seventeen".