844397 has 4 divisors (see below), whose sum is σ = 846240. Its totient is φ = 842556.

The previous prime is 844369. The next prime is 844421. The reversal of 844397 is 793448.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 844397 - 2⁸ = 844141 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 (844297) 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 in 3 ways as a sum of consecutive naturals, for example, 368 + ... + 1350.

It is an arithmetic number, because the mean of its divisors is an integer number (211560).

2⁸⁴⁴³⁹⁷ is an apocalyptic number.

It is an amenable number.

844397 is a deficient number, since it is larger than the sum of its proper divisors (1843).

844397 is an equidigital number, since it uses as much as digits as its factorization.

844397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842.

The product of its digits is 24192, while the sum is 35.

The square root of 844397 is about 918.9107682468. The cubic root of 844397 is about 94.5182257242.

The spelling of 844397 in words is "eight hundred forty-four thousand, three hundred ninety-seven".