163549 has 4 divisors (see below), whose sum is σ = 167580. Its totient is φ = 159520.

The previous prime is 163543. The next prime is 163561. The reversal of 163549 is 945361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 945361 = 53 ⋅17837.

It can be written as a sum of positive squares in 2 ways, for example, as 36100 + 127449 = 190^2 + 357^2 .

It is a cyclic number.

It is not a de Polignac number, because 163549 - 2⁵ = 163517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1954 + ... + 2035.

It is an arithmetic number, because the mean of its divisors is an integer number (41895).

2¹⁶³⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

163549 is a deficient number, since it is larger than the sum of its proper divisors (4031).

163549 is an equidigital number, since it uses as much as digits as its factorization.

163549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4030.

The product of its digits is 3240, while the sum is 28.

The square root of 163549 is about 404.4119187165. The cubic root of 163549 is about 54.6868150663.

The spelling of 163549 in words is "one hundred sixty-three thousand, five hundred forty-nine".