9697820 has 48 divisors (see below), whose sum is σ = 23532768. Its totient is φ = 3317760.

The previous prime is 9697817. The next prime is 9697829. The reversal of 9697820 is 287969.

9697820 = T₂₂₄ + T₂₂₅ + ... + T₄₁₀.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9697829) 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 15 ways as a sum of consecutive naturals, for example, 2444 + ... + 5036.

It is an arithmetic number, because the mean of its divisors is an integer number (490266).

Almost surely, 2^9697820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9697820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11766384).

9697820 is an abundant number, since it is smaller than the sum of its proper divisors (13834948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9697820 is a wasteful number, since it uses less digits than its factorization.

9697820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2630 (or 2628 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 9697820 is about 3114.1323029056. The cubic root of 9697820 is about 213.2511456412.

The spelling of 9697820 in words is "nine million, six hundred ninety-seven thousand, eight hundred twenty".