548991 has 8 divisors (see below), whose sum is σ = 813360. Its totient is φ = 365976.

The previous prime is 548963. The next prime is 549001. The reversal of 548991 is 199845.

548991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 548991 - 2⁶ = 548927 is a prime.

It is a super-2 number, since 2×548991² = 602782236162, which contains 22 as substring.

548991 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 548991.

It is not an unprimeable number, because it can be changed into a prime (548291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10140 + ... + 10193.

It is an arithmetic number, because the mean of its divisors is an integer number (101670).

2⁵⁴⁸⁹⁹¹ is an apocalyptic number.

548991 is a deficient number, since it is larger than the sum of its proper divisors (264369).

548991 is a wasteful number, since it uses less digits than its factorization.

548991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20342 (or 20336 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 548991 is about 740.9392687663. The cubic root of 548991 is about 81.8819936531.

It can be divided in two parts, 54 and 8991, that added together give a triangular number (9045 = T₁₃₄).

The spelling of 548991 in words is "five hundred forty-eight thousand, nine hundred ninety-one".