549413209 has 2 divisors, whose sum is σ = 549413210. Its totient is φ = 549413208.

The previous prime is 549413171. The next prime is 549413231. The reversal of 549413209 is 902314945.

549413209 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., 526564809 + 22848400 = 22947^2 + 4780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-549413209 is a prime.

It is not a weakly prime, because it can be changed into another prime (549413239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274706604 + 274706605.

It is an arithmetic number, because the mean of its divisors is an integer number (274706605).

Almost surely, 2^549413209 is an apocalyptic number.

It is an amenable number.

549413209 is a deficient number, since it is larger than the sum of its proper divisors (1).

549413209 is an equidigital number, since it uses as much as digits as its factorization.

549413209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 549413209 is about 23439.5650343602. The cubic root of 549413209 is about 819.0297909486.

The spelling of 549413209 in words is "five hundred forty-nine million, four hundred thirteen thousand, two hundred nine".