4549 has 2 divisors, whose sum is σ = 4550.
Its totient is φ = 4548.
The previous prime is 4547. The next prime is 4561. The reversal of 4549 is 9454.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 4225 + 324 = 65^2 + 18^2
It is a cyclic number.
It is not a de Polignac number, because 4549 - 21 = 4547 is a prime.
Together with 4547, it forms a pair of twin primes.
It is an alternating number because its digits alternate between even and odd.
It is a plaindrome in base 11.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (4547) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2274 + 2275.
It is an arithmetic number, because the mean of its divisors is an integer number (2275).
24549 is an apocalyptic number.
It is an amenable number.
4549 is a deficient number, since it is larger than the sum of its proper divisors (1).
4549 is an equidigital number, since it uses as much as digits as its factorization.
4549 is an evil number, because the sum of its binary digits is even.
The product of its digits is 720, while the sum is 22.
The square root of 4549 is about 67.4462749157.
The cubic root of 4549 is about 16.5693439142.
The spelling of 4549 in words is "four thousand, five hundred forty-nine".