818897 has 2 divisors, whose sum is σ = 818898. Its totient is φ = 818896.

The previous prime is 818887. The next prime is 818947. The reversal of 818897 is 798818.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 817216 + 1681 = 904^2 + 41^2 .

It is a cyclic number.

It is not a de Polignac number, because 818897 - 2¹⁸ = 556753 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (818827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409448 + 409449.

It is an arithmetic number, because the mean of its divisors is an integer number (409449).

2⁸¹⁸⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

818897 is a deficient number, since it is larger than the sum of its proper divisors (1).

818897 is an equidigital number, since it uses as much as digits as its factorization.

818897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 41.

The square root of 818897 is about 904.9292790047. The cubic root of 818897 is about 93.5570300365.

The spelling of 818897 in words is "eight hundred eighteen thousand, eight hundred ninety-seven".