549657 has 12 divisors (see below), whose sum is σ = 801060. Its totient is φ = 363168.

The previous prime is 549649. The next prime is 549667. The reversal of 549657 is 756945.

It can be written as a sum of positive squares in 2 ways, for example, as 145161 + 404496 = 381^2 + 636^2 .

It is not a de Polignac number, because 549657 - 2³ = 549649 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

549657 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 549657.

It is not an unprimeable number, because it can be changed into a prime (549607) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1219 + ... + 1607.

It is an arithmetic number, because the mean of its divisors is an integer number (66755).

2⁵⁴⁹⁶⁵⁷ is an apocalyptic number.

It is an amenable number.

549657 is a deficient number, since it is larger than the sum of its proper divisors (251403).

549657 is a wasteful number, since it uses less digits than its factorization.

549657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552 (or 549 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 549657 is about 741.3885620914. The cubic root of 549657 is about 81.9150915670.

The spelling of 549657 in words is "five hundred forty-nine thousand, six hundred fifty-seven".