8005549 has 2 divisors, whose sum is σ = 8005550. Its totient is φ = 8005548.

The previous prime is 8005531. The next prime is 8005559. The reversal of 8005549 is 9455008.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6985449 + 1020100 = 2643^2 + 1010^2 .

It is a cyclic number.

It is not a de Polignac number, because 8005549 - 2¹³ = 7997357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8005549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8005519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4002774 + 4002775.

It is an arithmetic number, because the mean of its divisors is an integer number (4002775).

Almost surely, 2^8005549 is an apocalyptic number.

It is an amenable number.

8005549 is a deficient number, since it is larger than the sum of its proper divisors (1).

8005549 is an equidigital number, since it uses as much as digits as its factorization.

8005549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 8005549 is about 2829.4078885873. The cubic root of 8005549 is about 200.0462309793.

The spelling of 8005549 in words is "eight million, five thousand, five hundred forty-nine".