897322821 has 8 divisors (see below), whose sum is σ = 1196749344. Its totient is φ = 598055760.

The previous prime is 897322793. The next prime is 897322837. The reversal of 897322821 is 128223798.

It is a happy number.

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

It is not a de Polignac number, because 897322821 - 2⁶ = 897322757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (897322121) 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, 26050 + ... + 49731.

It is an arithmetic number, because the mean of its divisors is an integer number (149593668).

Almost surely, 2^897322821 is an apocalyptic number.

It is an amenable number.

897322821 is a deficient number, since it is larger than the sum of its proper divisors (299426523).

897322821 is a wasteful number, since it uses less digits than its factorization.

897322821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79731.

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

The square root of 897322821 is about 29955.3471186698. The cubic root of 897322821 is about 964.5311049428.

The spelling of 897322821 in words is "eight hundred ninety-seven million, three hundred twenty-two thousand, eight hundred twenty-one".