9897747 has 8 divisors (see below), whose sum is σ = 13215744. Its totient is φ = 6589128.

The previous prime is 9897743. The next prime is 9897749. The reversal of 9897747 is 7477989.

9897747 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 9897747 - 2² = 9897743 is a prime.

9897747 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 9897747.

It is not an unprimeable number, because it can be changed into a prime (9897743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 678 + ... + 4500.

It is an arithmetic number, because the mean of its divisors is an integer number (1651968).

Almost surely, 2^9897747 is an apocalyptic number.

9897747 is a deficient number, since it is larger than the sum of its proper divisors (3317997).

9897747 is a wasteful number, since it uses less digits than its factorization.

9897747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4689.

The product of its digits is 889056, while the sum is 51.

The square root of 9897747 is about 3146.0684989364. The cubic root of 9897747 is about 214.7066270893.

The spelling of 9897747 in words is "nine million, eight hundred ninety-seven thousand, seven hundred forty-seven".