63323681 has 2 divisors, whose sum is σ = 63323682. Its totient is φ = 63323680.

The previous prime is 63323677. The next prime is 63323719. The reversal of 63323681 is 18632336.

63323681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50183056 + 13140625 = 7084^2 + 3625^2 .

It is a cyclic number.

It is not a de Polignac number, because 63323681 - 2² = 63323677 is a prime.

It is a super-2 number, since 2×63323681² = 8019777150779522, which contains 22 as substring.

It is a Chen prime.

It is equal to p_3747308 and since 63323681 and 3747308 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (63323621) 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, 31661840 + 31661841.

It is an arithmetic number, because the mean of its divisors is an integer number (31661841).

Almost surely, 2^63323681 is an apocalyptic number.

It is an amenable number.

63323681 is a deficient number, since it is larger than the sum of its proper divisors (1).

63323681 is an equidigital number, since it uses as much as digits as its factorization.

63323681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 32.

The square root of 63323681 is about 7957.6177968033. The cubic root of 63323681 is about 398.5860095506.

The spelling of 63323681 in words is "sixty-three million, three hundred twenty-three thousand, six hundred eighty-one".