63989793 has 24 divisors (see below), whose sum is σ = 107372096. Its totient is φ = 35964000.

The previous prime is 63989791. The next prime is 63989801. The reversal of 63989793 is 39798936.

It is not a de Polignac number, because 63989793 - 2¹ = 63989791 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63989791) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4483 + ... + 12168.

Almost surely, 2^63989793 is an apocalyptic number.

63989793 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

63989793 is a deficient number, since it is larger than the sum of its proper divisors (43382303).

63989793 is a wasteful number, since it uses less digits than its factorization.

63989793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16725 (or 16722 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 54.

The square root of 63989793 is about 7999.3620370627. The cubic root of 63989793 is about 399.9787342861.

The spelling of 63989793 in words is "sixty-three million, nine hundred eighty-nine thousand, seven hundred ninety-three".