549832109 has 2 divisors, whose sum is σ = 549832110. Its totient is φ = 549832108.

The previous prime is 549832091. The next prime is 549832147. The reversal of 549832109 is 901238945.

Together with previous prime (549832091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 545222500 + 4609609 = 23350^2 + 2147^2 .

It is a cyclic number.

It is not a de Polignac number, because 549832109 - 2¹⁶ = 549766573 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (549832159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274916054 + 274916055.

It is an arithmetic number, because the mean of its divisors is an integer number (274916055).

Almost surely, 2^549832109 is an apocalyptic number.

It is an amenable number.

549832109 is a deficient number, since it is larger than the sum of its proper divisors (1).

549832109 is an equidigital number, since it uses as much as digits as its factorization.

549832109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 549832109 is about 23448.4990777662. The cubic root of 549832109 is about 819.2378944391.

The spelling of 549832109 in words is "five hundred forty-nine million, eight hundred thirty-two thousand, one hundred nine".