549001 has 2 divisors, whose sum is σ = 549002. Its totient is φ = 549000.

The previous prime is 548963. The next prime is 549011. The reversal of 549001 is 100945.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 491401 + 57600 = 701^2 + 240^2 .

It is a cyclic number.

It is not a de Polignac number, because 549001 - 2⁹ = 548489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 549001.

It is not a weakly prime, because it can be changed into another prime (549011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274500 + 274501.

It is an arithmetic number, because the mean of its divisors is an integer number (274501).

2⁵⁴⁹⁰⁰¹ is an apocalyptic number.

It is an amenable number.

549001 is a deficient number, since it is larger than the sum of its proper divisors (1).

549001 is an equidigital number, since it uses as much as digits as its factorization.

549001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 549001 is about 740.9460169270. The cubic root of 549001 is about 81.8824908167.

Adding to 549001 its reverse (100945), we get a palindrome (649946).

The spelling of 549001 in words is "five hundred forty-nine thousand, one".