8921397 has 8 divisors (see below), whose sum is σ = 12279040. Its totient is φ = 5755680.

The previous prime is 8921389. The next prime is 8921417. The reversal of 8921397 is 7931298.

8921397 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 8921397 - 2³ = 8921389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8921377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47872 + ... + 48057.

It is an arithmetic number, because the mean of its divisors is an integer number (1534880).

Almost surely, 2^8921397 is an apocalyptic number.

It is an amenable number.

8921397 is a deficient number, since it is larger than the sum of its proper divisors (3357643).

8921397 is a wasteful number, since it uses less digits than its factorization.

8921397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95963.

The product of its digits is 27216, while the sum is 39.

The square root of 8921397 is about 2986.8707705557. The cubic root of 8921397 is about 207.4010521606.

Subtracting from 8921397 its reverse (7931298), we obtain a palindrome (990099).

The spelling of 8921397 in words is "eight million, nine hundred twenty-one thousand, three hundred ninety-seven".