805369 has 2 divisors, whose sum is σ = 805370. Its totient is φ = 805368.

The previous prime is 805339. The next prime is 805381. The reversal of 805369 is 963508.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 660969 + 144400 = 813^2 + 380^2 .

It is a cyclic number.

It is not a de Polignac number, because 805369 - 2⁷ = 805241 is a prime.

It is a super-2 number, since 2×805369² = 1297238452322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 805369.

It is not a weakly prime, because it can be changed into another prime (805309) 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, 402684 + 402685.

It is an arithmetic number, because the mean of its divisors is an integer number (402685).

2⁸⁰⁵³⁶⁹ is an apocalyptic number.

It is an amenable number.

805369 is a deficient number, since it is larger than the sum of its proper divisors (1).

805369 is an equidigital number, since it uses as much as digits as its factorization.

805369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 805369 is about 897.4235343471. The cubic root of 805369 is about 93.0389862366.

The spelling of 805369 in words is "eight hundred five thousand, three hundred sixty-nine".