9971798 has 8 divisors (see below), whose sum is σ = 15090408. Its totient is φ = 4941664.

The previous prime is 9971783. The next prime is 9971807. The reversal of 9971798 is 8971799.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21836 + ... + 22287.

It is an arithmetic number, because the mean of its divisors is an integer number (1886301).

Almost surely, 2^9971798 is an apocalyptic number.

9971798 is a deficient number, since it is larger than the sum of its proper divisors (5118610).

9971798 is a wasteful number, since it uses less digits than its factorization.

9971798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44238.

The product of its digits is 285768, while the sum is 50.

The square root of 9971798 is about 3157.8153840907. The cubic root of 9971798 is about 215.2407470877.

Subtracting from 9971798 its reverse (8971799), we obtain a palindrome (999999).

The spelling of 9971798 in words is "nine million, nine hundred seventy-one thousand, seven hundred ninety-eight".