54185009 has 2 divisors, whose sum is σ = 54185010. Its totient is φ = 54185008.

The previous prime is 54184997. The next prime is 54185023. The reversal of 54185009 is 90058145.

54185009 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., 30691600 + 23493409 = 5540^2 + 4847^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54185009 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (54185059) 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, 27092504 + 27092505.

It is an arithmetic number, because the mean of its divisors is an integer number (27092505).

Almost surely, 2^54185009 is an apocalyptic number.

It is an amenable number.

54185009 is a deficient number, since it is larger than the sum of its proper divisors (1).

54185009 is an equidigital number, since it uses as much as digits as its factorization.

54185009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 54185009 is about 7361.0467326325. The cubic root of 54185009 is about 378.4074835525.

The spelling of 54185009 in words is "fifty-four million, one hundred eighty-five thousand, nine".