844279 has 2 divisors, whose sum is σ = 844280. Its totient is φ = 844278.

The previous prime is 844253. The next prime is 844289. The reversal of 844279 is 972448.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 844279 - 2⁵ = 844247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (844289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422139 + 422140.

It is an arithmetic number, because the mean of its divisors is an integer number (422140).

844279 is a Friedman number, since it can be written as 7^(9-2)+(8+4)^4, using all its digits and the basic arithmetic operations.

2⁸⁴⁴²⁷⁹ is an apocalyptic number.

844279 is a deficient number, since it is larger than the sum of its proper divisors (1).

844279 is an equidigital number, since it uses as much as digits as its factorization.

844279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 34.

The square root of 844279 is about 918.8465595517. The cubic root of 844279 is about 94.5138227123.

The spelling of 844279 in words is "eight hundred forty-four thousand, two hundred seventy-nine".