63678071 has 2 divisors, whose sum is σ = 63678072. Its totient is φ = 63678070.

The previous prime is 63678049. The next prime is 63678077. The reversal of 63678071 is 17087636.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63678071 - 2¹⁴ = 63661687 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63678077) 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, 31839035 + 31839036.

It is an arithmetic number, because the mean of its divisors is an integer number (31839036).

Almost surely, 2^63678071 is an apocalyptic number.

63678071 is a deficient number, since it is larger than the sum of its proper divisors (1).

63678071 is an equidigital number, since it uses as much as digits as its factorization.

63678071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 63678071 is about 7979.8540713474. The cubic root of 63678071 is about 399.3281868829.

The spelling of 63678071 in words is "sixty-three million, six hundred seventy-eight thousand, seventy-one".