9897849 has 32 divisors (see below), whose sum is σ = 15980160. Its totient is φ = 6018624.

The previous prime is 9897847. The next prime is 9897857. The reversal of 9897849 is 9487989.

It is not a de Polignac number, because 9897849 - 2¹ = 9897847 is a prime.

9897849 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 9897795 and 9897804.

It is not an unprimeable number, because it can be changed into a prime (9897847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57127 + ... + 57299.

It is an arithmetic number, because the mean of its divisors is an integer number (499380).

Almost surely, 2^9897849 is an apocalyptic number.

It is an amenable number.

9897849 is a deficient number, since it is larger than the sum of its proper divisors (6082311).

9897849 is a wasteful number, since it uses less digits than its factorization.

9897849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358 (or 352 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 9897849 is about 3146.0847096034. The cubic root of 9897849 is about 214.7073646309.

The spelling of 9897849 in words is "nine million, eight hundred ninety-seven thousand, eight hundred forty-nine".