9897690 has 64 divisors (see below), whose sum is σ = 26282880. Its totient is φ = 2365440.

The previous prime is 9897661. The next prime is 9897703. The reversal of 9897690 is 967989.

It is a happy number.

9897690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×9897690² = 195928534672200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29202 + ... + 29538.

It is an arithmetic number, because the mean of its divisors is an integer number (410670).

Almost surely, 2^9897690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9897690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13141440).

9897690 is an abundant number, since it is smaller than the sum of its proper divisors (16385190).

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

9897690 is a wasteful number, since it uses less digits than its factorization.

9897690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447.

The product of its (nonzero) digits is 244944, while the sum is 48.

The square root of 9897690 is about 3146.0594399979. The cubic root of 9897690 is about 214.7062149315.

The spelling of 9897690 in words is "nine million, eight hundred ninety-seven thousand, six hundred ninety".