549890009 has 2 divisors, whose sum is σ = 549890010. Its totient is φ = 549890008.

The previous prime is 549889943. The next prime is 549890053. The reversal of 549890009 is 900098945.

549890009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (549890053) can be obtained adding 549890009 to its sum of digits (44).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 328624384 + 221265625 = 18128^2 + 14875^2 .

It is a cyclic number.

It is not a de Polignac number, because 549890009 - 2¹² = 549885913 is a prime.

It is not a weakly prime, because it can be changed into another prime (549890309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274945004 + 274945005.

It is an arithmetic number, because the mean of its divisors is an integer number (274945005).

Almost surely, 2^549890009 is an apocalyptic number.

It is an amenable number.

549890009 is a deficient number, since it is larger than the sum of its proper divisors (1).

549890009 is an equidigital number, since it uses as much as digits as its factorization.

549890009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 549890009 is about 23449.7336658649. The cubic root of 549890009 is about 819.2666500104.

The spelling of 549890009 in words is "five hundred forty-nine million, eight hundred ninety thousand, nine".