63788921 has 8 divisors (see below), whose sum is σ = 72952320. Its totient is φ = 54638208.

The previous prime is 63788911. The next prime is 63788941. The reversal of 63788921 is 12988736.

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

It is a cyclic number.

It is not a de Polignac number, because 63788921 - 2¹⁰ = 63787897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63788911) 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 in 7 ways as a sum of consecutive naturals, for example, 13385 + ... + 17513.

It is an arithmetic number, because the mean of its divisors is an integer number (9119040).

Almost surely, 2^63788921 is an apocalyptic number.

It is an amenable number.

63788921 is a deficient number, since it is larger than the sum of its proper divisors (9163399).

63788921 is a wasteful number, since it uses less digits than its factorization.

63788921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6343.

The product of its digits is 145152, while the sum is 44.

The square root of 63788921 is about 7986.7966669999. The cubic root of 63788921 is about 399.5597677500.

The spelling of 63788921 in words is "sixty-three million, seven hundred eighty-eight thousand, nine hundred twenty-one".