549761 has 4 divisors (see below), whose sum is σ = 556800. Its totient is φ = 542724.

The previous prime is 549751. The next prime is 549767. The reversal of 549761 is 167945.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 167945 = 5 ⋅33589.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-549761 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 549761.

It is not an unprimeable number, because it can be changed into a prime (549767) 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 in 3 ways as a sum of consecutive naturals, for example, 3401 + ... + 3558.

It is an arithmetic number, because the mean of its divisors is an integer number (139200).

2⁵⁴⁹⁷⁶¹ is an apocalyptic number.

It is an amenable number.

549761 is a deficient number, since it is larger than the sum of its proper divisors (7039).

549761 is an equidigital number, since it uses as much as digits as its factorization.

549761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7038.

The product of its digits is 7560, while the sum is 32.

The square root of 549761 is about 741.4586974336. The cubic root of 549761 is about 81.9202575962.

The spelling of 549761 in words is "five hundred forty-nine thousand, seven hundred sixty-one".