9988993 has 6 divisors (see below), whose sum is σ = 11619906. Its totient is φ = 8561952.

The previous prime is 9988991. The next prime is 9989027. The reversal of 9988993 is 3998899.

9988993 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6036849 + 3952144 = 2457^2 + 1988^2 .

It is not a de Polignac number, because 9988993 - 2¹ = 9988991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9988991) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 101880 + ... + 101977.

It is an arithmetic number, because the mean of its divisors is an integer number (1936651).

Almost surely, 2^9988993 is an apocalyptic number.

It is an amenable number.

9988993 is a deficient number, since it is larger than the sum of its proper divisors (1630913).

9988993 is a wasteful number, since it uses less digits than its factorization.

9988993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203871 (or 203864 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 55.

The square root of 9988993 is about 3160.5368214909. The cubic root of 9988993 is about 215.3643937746.

The spelling of 9988993 in words is "nine million, nine hundred eighty-eight thousand, nine hundred ninety-three".