805044917 has 2 divisors, whose sum is σ = 805044918. Its totient is φ = 805044916.

The previous prime is 805044907. The next prime is 805044967. The reversal of 805044917 is 719440508.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 663886756 + 141158161 = 25766^2 + 11881^2 .

It is a cyclic number.

It is not a de Polignac number, because 805044917 - 2¹⁶ = 804979381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (805044907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402522458 + 402522459.

It is an arithmetic number, because the mean of its divisors is an integer number (402522459).

Almost surely, 2^805044917 is an apocalyptic number.

It is an amenable number.

805044917 is a deficient number, since it is larger than the sum of its proper divisors (1).

805044917 is an equidigital number, since it uses as much as digits as its factorization.

805044917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 805044917 is about 28373.3134652969. The cubic root of 805044917 is about 930.2650483609.

The spelling of 805044917 in words is "eight hundred five million, forty-four thousand, nine hundred seventeen".