54000209 has 2 divisors, whose sum is σ = 54000210. Its totient is φ = 54000208.

The previous prime is 54000203. The next prime is 54000259. The reversal of 54000209 is 90200045.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53875600 + 124609 = 7340^2 + 353^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54000209 is a prime.

It is a Chen prime.

It is equal to p_3226214 and since 54000209 and 3226214 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (54000203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27000104 + 27000105.

It is an arithmetic number, because the mean of its divisors is an integer number (27000105).

Almost surely, 2^54000209 is an apocalyptic number.

It is an amenable number.

54000209 is a deficient number, since it is larger than the sum of its proper divisors (1).

54000209 is an equidigital number, since it uses as much as digits as its factorization.

54000209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 54000209 is about 7348.4834489846. The cubic root of 54000209 is about 377.9768026039.

The spelling of 54000209 in words is "fifty-four million, two hundred nine", and thus it is an aban number.