8939897 has 4 divisors (see below), whose sum is σ = 8946036. Its totient is φ = 8933760.

The previous prime is 8939891. The next prime is 8939921. The reversal of 8939897 is 7989398.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7989398 = 2 ⋅3994699.

It can be written as a sum of positive squares in 2 ways, for example, as 3759721 + 5180176 = 1939^2 + 2276^2 .

It is a cyclic number.

It is not a de Polignac number, because 8939897 - 2²² = 4745593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8939891) 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 3 ways as a sum of consecutive naturals, for example, 497 + ... + 4257.

It is an arithmetic number, because the mean of its divisors is an integer number (2236509).

Almost surely, 2^8939897 is an apocalyptic number.

It is an amenable number.

8939897 is a deficient number, since it is larger than the sum of its proper divisors (6139).

8939897 is a wasteful number, since it uses less digits than its factorization.

8939897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6138.

The product of its digits is 979776, while the sum is 53.

The square root of 8939897 is about 2989.9660533190. The cubic root of 8939897 is about 207.5443133693.

The spelling of 8939897 in words is "eight million, nine hundred thirty-nine thousand, eight hundred ninety-seven".