64549 has 4 divisors (see below), whose sum is σ = 68364. Its totient is φ = 60736.

The previous prime is 64513. The next prime is 64553. The reversal of 64549 is 94546.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20449 + 44100 = 143^2 + 210^2 .

It is a cyclic number.

It is not a de Polignac number, because 64549 - 2⁹ = 64037 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 (64579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1882 + ... + 1915.

It is an arithmetic number, because the mean of its divisors is an integer number (17091).

2⁶⁴⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

64549 is a deficient number, since it is larger than the sum of its proper divisors (3815).

64549 is a wasteful number, since it uses less digits than its factorization.

64549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3814.

The product of its digits is 4320, while the sum is 28.

The square root of 64549 is about 254.0649523252. The cubic root of 64549 is about 40.1140495087.

The spelling of 64549 in words is "sixty-four thousand, five hundred forty-nine".