549697 has 4 divisors (see below), whose sum is σ = 552916. Its totient is φ = 546480.

The previous prime is 549691. The next prime is 549701. The reversal of 549697 is 796945.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 796945 = 5 ⋅159389.

It can be written as a sum of positive squares in 2 ways, for example, as 194481 + 355216 = 441^2 + 596^2 .

It is a cyclic number.

It is not a de Polignac number, because 549697 - 2⁷ = 549569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (549691) 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, 1338 + ... + 1699.

It is an arithmetic number, because the mean of its divisors is an integer number (138229).

2⁵⁴⁹⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

549697 is a deficient number, since it is larger than the sum of its proper divisors (3219).

549697 is a wasteful number, since it uses less digits than its factorization.

549697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3218.

The product of its digits is 68040, while the sum is 40.

The square root of 549697 is about 741.4155380082. The cubic root of 549697 is about 81.9170785784.

The spelling of 549697 in words is "five hundred forty-nine thousand, six hundred ninety-seven".