549553 has 2 divisors, whose sum is σ = 549554. Its totient is φ = 549552.

The previous prime is 549551. The next prime is 549569. The reversal of 549553 is 355945.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 451584 + 97969 = 672^2 + 313^2 .

It is a cyclic number.

It is not a de Polignac number, because 549553 - 2¹ = 549551 is a prime.

Together with 549551, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (549551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274776 + 274777.

It is an arithmetic number, because the mean of its divisors is an integer number (274777).

2⁵⁴⁹⁵⁵³ is an apocalyptic number.

It is an amenable number.

549553 is a deficient number, since it is larger than the sum of its proper divisors (1).

549553 is an equidigital number, since it uses as much as digits as its factorization.

549553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13500, while the sum is 31.

The square root of 549553 is about 741.3184201138. The cubic root of 549553 is about 81.9099248861.

The spelling of 549553 in words is "five hundred forty-nine thousand, five hundred fifty-three".