549641 has 2 divisors, whose sum is σ = 549642. Its totient is φ = 549640.

The previous prime is 549623. The next prime is 549643. The reversal of 549641 is 146945.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 511225 + 38416 = 715^2 + 196^2 .

It is a cyclic number.

It is not a de Polignac number, because 549641 - 2¹⁴ = 533257 is a prime.

Together with 549643, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (549643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274820 + 274821.

It is an arithmetic number, because the mean of its divisors is an integer number (274821).

2⁵⁴⁹⁶⁴¹ is an apocalyptic number.

It is an amenable number.

549641 is a deficient number, since it is larger than the sum of its proper divisors (1).

549641 is an equidigital number, since it uses as much as digits as its factorization.

549641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 29.

The square root of 549641 is about 741.3777714499. The cubic root of 549641 is about 81.9142967354.

The spelling of 549641 in words is "five hundred forty-nine thousand, six hundred forty-one".