68549 has 4 divisors (see below), whose sum is σ = 73836. Its totient is φ = 63264.

The previous prime is 68543. The next prime is 68567. The reversal of 68549 is 94586.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94586 = 2 ⋅47293.

It can be written as a sum of positive squares in 2 ways, for example, as 21025 + 47524 = 145^2 + 218^2 .

It is a cyclic number.

It is not a de Polignac number, because 68549 - 2¹² = 64453 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 (68543) 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, 2624 + ... + 2649.

It is an arithmetic number, because the mean of its divisors is an integer number (18459).

2⁶⁸⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

68549 is a deficient number, since it is larger than the sum of its proper divisors (5287).

68549 is a wasteful number, since it uses less digits than its factorization.

68549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5286.

The product of its digits is 8640, while the sum is 32.

The square root of 68549 is about 261.8186395198. The cubic root of 68549 is about 40.9261012686.

The spelling of 68549 in words is "sixty-eight thousand, five hundred forty-nine".