897797 has 4 divisors (see below), whose sum is σ = 918720. Its totient is φ = 876876.

The previous prime is 897781. The next prime is 897817. The reversal of 897797 is 797798.

897797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 897797 - 2⁴ = 897781 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 (897707) 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, 10397 + ... + 10482.

It is an arithmetic number, because the mean of its divisors is an integer number (229680).

2⁸⁹⁷⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

897797 is a deficient number, since it is larger than the sum of its proper divisors (20923).

897797 is a wasteful number, since it uses less digits than its factorization.

897797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20922.

The product of its digits is 222264, while the sum is 47.

The square root of 897797 is about 947.5215037138. The cubic root of 897797 is about 96.4700973150.

Subtracting from 897797 its reverse (797798), we obtain a palindrome (99999).

The spelling of 897797 in words is "eight hundred ninety-seven thousand, seven hundred ninety-seven".