55447009 has 2 divisors, whose sum is σ = 55447010. Its totient is φ = 55447008.

The previous prime is 55447001. The next prime is 55447031. The reversal of 55447009 is 90074455.

55447009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48608784 + 6838225 = 6972^2 + 2615^2 .

It is a cyclic number.

It is not a de Polignac number, because 55447009 - 2³ = 55447001 is a prime.

It is not a weakly prime, because it can be changed into another prime (55447001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27723504 + 27723505.

It is an arithmetic number, because the mean of its divisors is an integer number (27723505).

Almost surely, 2^55447009 is an apocalyptic number.

It is an amenable number.

55447009 is a deficient number, since it is larger than the sum of its proper divisors (1).

55447009 is an equidigital number, since it uses as much as digits as its factorization.

55447009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 55447009 is about 7446.2748404823. The cubic root of 55447009 is about 381.3227425831.

The spelling of 55447009 in words is "fifty-five million, four hundred forty-seven thousand, nine".