55544009 has 2 divisors, whose sum is σ = 55544010. Its totient is φ = 55544008.

The previous prime is 55543997. The next prime is 55544017. The reversal of 55544009 is 90044555.

It is a happy number.

55544009 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., 54804409 + 739600 = 7403^2 + 860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55544009 is a prime.

It is not a weakly prime, because it can be changed into another prime (55544059) 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, 27772004 + 27772005.

It is an arithmetic number, because the mean of its divisors is an integer number (27772005).

Almost surely, 2^55544009 is an apocalyptic number.

It is an amenable number.

55544009 is a deficient number, since it is larger than the sum of its proper divisors (1).

55544009 is an equidigital number, since it uses as much as digits as its factorization.

55544009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 55544009 is about 7452.7853182552. The cubic root of 55544009 is about 381.5449773396.

The spelling of 55544009 in words is "fifty-five million, five hundred forty-four thousand, nine".