549023 has 2 divisors, whose sum is σ = 549024. Its totient is φ = 549022.

The previous prime is 549019. The next prime is 549037. The reversal of 549023 is 320945.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 549023 - 2² = 549019 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 549023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (549013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274511 + 274512.

It is an arithmetic number, because the mean of its divisors is an integer number (274512).

2⁵⁴⁹⁰²³ is an apocalyptic number.

549023 is a deficient number, since it is larger than the sum of its proper divisors (1).

549023 is an equidigital number, since it uses as much as digits as its factorization.

549023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 549023 is about 740.9608626641. The cubic root of 549023 is about 81.8835845553.

Adding to 549023 its reverse (320945), we get a palindrome (869968).

The spelling of 549023 in words is "five hundred forty-nine thousand, twenty-three".