9897391 has 8 divisors (see below), whose sum is σ = 11342240. Its totient is φ = 8460288.

The previous prime is 9897367. The next prime is 9897397. The reversal of 9897391 is 1937989.

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

It is a cyclic number.

It is not a de Polignac number, because 9897391 - 2⁷ = 9897263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9897397) 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 7 ways as a sum of consecutive naturals, for example, 1135 + ... + 4591.

It is an arithmetic number, because the mean of its divisors is an integer number (1417780).

Almost surely, 2^9897391 is an apocalyptic number.

9897391 is a deficient number, since it is larger than the sum of its proper divisors (1444849).

9897391 is a wasteful number, since it uses less digits than its factorization.

9897391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3873.

The product of its digits is 122472, while the sum is 46.

The square root of 9897391 is about 3146.0119198757. The cubic root of 9897391 is about 214.7040528847.

The spelling of 9897391 in words is "nine million, eight hundred ninety-seven thousand, three hundred ninety-one".