63399971 has 2 divisors, whose sum is σ = 63399972. Its totient is φ = 63399970.

The previous prime is 63399943. The next prime is 63399977. The reversal of 63399971 is 17999336.

63399971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63399971 is a prime.

It is not a weakly prime, because it can be changed into another prime (63399977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31699985 + 31699986.

It is an arithmetic number, because the mean of its divisors is an integer number (31699986).

Almost surely, 2^63399971 is an apocalyptic number.

63399971 is a deficient number, since it is larger than the sum of its proper divisors (1).

63399971 is an equidigital number, since it uses as much as digits as its factorization.

63399971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 275562, while the sum is 47.

The square root of 63399971 is about 7962.4098739012. The cubic root of 63399971 is about 398.7460124797.

The spelling of 63399971 in words is "sixty-three million, three hundred ninety-nine thousand, nine hundred seventy-one".