99993663 has 48 divisors (see below), whose sum is σ = 188017920. Its totient is φ = 51937200.

The previous prime is 99993611. The next prime is 99993671. The reversal of 99993663 is 36639999.

It is not a de Polignac number, because 99993663 - 2⁸ = 99993407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99993163) 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 47 ways as a sum of consecutive naturals, for example, 11118 + ... + 17988.

It is an arithmetic number, because the mean of its divisors is an integer number (3917040).

Almost surely, 2^99993663 is an apocalyptic number.

99993663 is a deficient number, since it is larger than the sum of its proper divisors (88024257).

99993663 is a wasteful number, since it uses less digits than its factorization.

99993663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6905 (or 6892 counting only the distinct ones).

The product of its digits is 2125764, while the sum is 54.

The square root of 99993663 is about 9999.6831449801. The cubic root of 99993663 is about 464.1490785714.

It can be divided in two parts, 999936 and 63, that added together give a palindrome (999999).

The spelling of 99993663 in words is "ninety-nine million, nine hundred ninety-three thousand, six hundred sixty-three".