63543621 has 8 divisors (see below), whose sum is σ = 85502560. Its totient is φ = 41973552.

The previous prime is 63543617. The next prime is 63543659. The reversal of 63543621 is 12634536.

63543621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 63543621 - 2² = 63543617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63543691) 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 in 7 ways as a sum of consecutive naturals, for example, 96835 + ... + 97488.

It is an arithmetic number, because the mean of its divisors is an integer number (10687820).

Almost surely, 2^63543621 is an apocalyptic number.

It is an amenable number.

63543621 is a deficient number, since it is larger than the sum of its proper divisors (21958939).

63543621 is a wasteful number, since it uses less digits than its factorization.

63543621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194435.

The product of its digits is 12960, while the sum is 30.

The square root of 63543621 is about 7971.4252803373. The cubic root of 63543621 is about 399.0469414185.

The spelling of 63543621 in words is "sixty-three million, five hundred forty-three thousand, six hundred twenty-one".