9897993 has 24 divisors (see below), whose sum is σ = 17201600. Its totient is φ = 5357664.

The previous prime is 9897983. The next prime is 9898001. The reversal of 9897993 is 3997989.

It is a happy number.

It is not a de Polignac number, because 9897993 - 2⁶ = 9897929 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9897913) 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, 2938 + ... + 5331.

Almost surely, 2^9897993 is an apocalyptic number.

It is an amenable number.

9897993 is a deficient number, since it is larger than the sum of its proper divisors (7303607).

9897993 is a wasteful number, since it uses less digits than its factorization.

9897993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8301 (or 8298 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 54.

The square root of 9897993 is about 3146.1075951086. The cubic root of 9897993 is about 214.7084058575.

The spelling of 9897993 in words is "nine million, eight hundred ninety-seven thousand, nine hundred ninety-three".