549965 has 8 divisors (see below), whose sum is σ = 710808. Its totient is φ = 406080.

The previous prime is 549949. The next prime is 549977. The reversal of 549965 is 569945.

It can be written as a sum of positive squares in 4 ways, for example, as 51529 + 498436 = 227^2 + 706^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 549965 - 2⁴ = 549949 is a prime.

It is a Duffinian 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 549965.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4166 + ... + 4295.

It is an arithmetic number, because the mean of its divisors is an integer number (88851).

2⁵⁴⁹⁹⁶⁵ is an apocalyptic number.

It is an amenable number.

549965 is a deficient number, since it is larger than the sum of its proper divisors (160843).

549965 is a wasteful number, since it uses less digits than its factorization.

549965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8479.

The product of its digits is 48600, while the sum is 38.

The square root of 549965 is about 741.5962513390. The cubic root of 549965 is about 81.9303890690.

It can be divided in two parts, 5499 and 65, that multiplied together give a triangular number (357435 = T₈₄₅).

The spelling of 549965 in words is "five hundred forty-nine thousand, nine hundred sixty-five".