63986171 has 2 divisors, whose sum is σ = 63986172. Its totient is φ = 63986170.

The previous prime is 63986159. The next prime is 63986189. The reversal of 63986171 is 17168936.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63986171 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63986101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31993085 + 31993086.

It is an arithmetic number, because the mean of its divisors is an integer number (31993086).

Almost surely, 2^63986171 is an apocalyptic number.

63986171 is a deficient number, since it is larger than the sum of its proper divisors (1).

63986171 is an equidigital number, since it uses as much as digits as its factorization.

63986171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 41.

The square root of 63986171 is about 7999.1356408052. The cubic root of 63986171 is about 399.9711875080.

The spelling of 63986171 in words is "sixty-three million, nine hundred eighty-six thousand, one hundred seventy-one".