8640897 has 4 divisors (see below), whose sum is σ = 11521200. Its totient is φ = 5760596.

The previous prime is 8640889. The next prime is 8640911. The reversal of 8640897 is 7980468.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8640897 - 2³ = 8640889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8640817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1440147 + ... + 1440152.

It is an arithmetic number, because the mean of its divisors is an integer number (2880300).

Almost surely, 2^8640897 is an apocalyptic number.

It is an amenable number.

8640897 is a deficient number, since it is larger than the sum of its proper divisors (2880303).

8640897 is a wasteful number, since it uses less digits than its factorization.

8640897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2880302.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 8640897 is about 2939.5402701783. The cubic root of 8640897 is about 205.2042145056.

The spelling of 8640897 in words is "eight million, six hundred forty thousand, eight hundred ninety-seven".