805279 has 2 divisors, whose sum is σ = 805280. Its totient is φ = 805278.

The previous prime is 805271. The next prime is 805289. The reversal of 805279 is 972508.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 805279 - 2³ = 805271 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 805279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (805271) 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, 402639 + 402640.

It is an arithmetic number, because the mean of its divisors is an integer number (402640).

2⁸⁰⁵²⁷⁹ is an apocalyptic number.

805279 is a deficient number, since it is larger than the sum of its proper divisors (1).

805279 is an equidigital number, since it uses as much as digits as its factorization.

805279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 805279 is about 897.3733893982. The cubic root of 805279 is about 93.0355204047.

The spelling of 805279 in words is "eight hundred five thousand, two hundred seventy-nine".