805655549 has 2 divisors, whose sum is σ = 805655550. Its totient is φ = 805655548.

The previous prime is 805655471. The next prime is 805655573. The reversal of 805655549 is 945556508.

805655549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 799871524 + 5784025 = 28282^2 + 2405^2 .

It is a cyclic number.

It is not a de Polignac number, because 805655549 - 2¹⁶ = 805590013 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (805655579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402827774 + 402827775.

It is an arithmetic number, because the mean of its divisors is an integer number (402827775).

Almost surely, 2^805655549 is an apocalyptic number.

It is an amenable number.

805655549 is a deficient number, since it is larger than the sum of its proper divisors (1).

805655549 is an equidigital number, since it uses as much as digits as its factorization.

805655549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080000, while the sum is 47.

The square root of 805655549 is about 28384.0721003876. The cubic root of 805655549 is about 930.5001930228.

The spelling of 805655549 in words is "eight hundred five million, six hundred fifty-five thousand, five hundred forty-nine".