63919663 has 2 divisors, whose sum is σ = 63919664. Its totient is φ = 63919662.

The previous prime is 63919633. The next prime is 63919673. The reversal of 63919663 is 36691936.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63919663 - 2⁹ = 63919151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63919633) 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, 31959831 + 31959832.

It is an arithmetic number, because the mean of its divisors is an integer number (31959832).

Almost surely, 2^63919663 is an apocalyptic number.

63919663 is a deficient number, since it is larger than the sum of its proper divisors (1).

63919663 is an equidigital number, since it uses as much as digits as its factorization.

63919663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 157464, while the sum is 43.

The square root of 63919663 is about 7994.9773608185. The cubic root of 63919663 is about 399.8325611704.

It can be divided in two parts, 639 and 19663, that added together give a palindrome (20302).

The spelling of 63919663 in words is "sixty-three million, nine hundred nineteen thousand, six hundred sixty-three".