548661 has 4 divisors (see below), whose sum is σ = 731552. Its totient is φ = 365772.

The previous prime is 548657. The next prime is 548671. The reversal of 548661 is 166845.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 548661 - 2² = 548657 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (548671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91441 + ... + 91446.

It is an arithmetic number, because the mean of its divisors is an integer number (182888).

2⁵⁴⁸⁶⁶¹ is an apocalyptic number.

It is an amenable number.

548661 is a deficient number, since it is larger than the sum of its proper divisors (182891).

548661 is a wasteful number, since it uses less digits than its factorization.

548661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182890.

The product of its digits is 5760, while the sum is 30.

The square root of 548661 is about 740.7165449752. The cubic root of 548661 is about 81.8655838675.

The spelling of 548661 in words is "five hundred forty-eight thousand, six hundred sixty-one".