843397 has 2 divisors, whose sum is σ = 843398. Its totient is φ = 843396.

The previous prime is 843383. The next prime is 843443. The reversal of 843397 is 793348.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 772641 + 70756 = 879^2 + 266^2 .

It is a cyclic number.

It is not a de Polignac number, because 843397 - 2¹¹ = 841349 is a prime.

It is a super-2 number, since 2×843397² = 1422636999218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (843307) 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 as a sum of consecutive naturals, namely, 421698 + 421699.

It is an arithmetic number, because the mean of its divisors is an integer number (421699).

2⁸⁴³³⁹⁷ is an apocalyptic number.

It is an amenable number.

843397 is a deficient number, since it is larger than the sum of its proper divisors (1).

843397 is an equidigital number, since it uses as much as digits as its factorization.

843397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 34.

The square root of 843397 is about 918.3664845801. The cubic root of 843397 is about 94.4808990630.

It can be divided in two parts, 84 and 3397, that added together give a square (3481 = 59²).

The spelling of 843397 in words is "eight hundred forty-three thousand, three hundred ninety-seven".