63648993 has 12 divisors (see below), whose sum is σ = 89568528. Its totient is φ = 40198680.

The previous prime is 63648961. The next prime is 63649013. The reversal of 63648993 is 39984636.

It is not a de Polignac number, because 63648993 - 2⁵ = 63648961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63648913) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28303 + ... + 30468.

It is an arithmetic number, because the mean of its divisors is an integer number (7464044).

Almost surely, 2^63648993 is an apocalyptic number.

It is an amenable number.

63648993 is a deficient number, since it is larger than the sum of its proper divisors (25919535).

63648993 is a wasteful number, since it uses less digits than its factorization.

63648993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58812 (or 58793 counting only the distinct ones).

The product of its digits is 839808, while the sum is 48.

The square root of 63648993 is about 7978.0319001618. The cubic root of 63648993 is about 399.2673944586.

The spelling of 63648993 in words is "sixty-three million, six hundred forty-eight thousand, nine hundred ninety-three".