68609 has 8 divisors (see below), whose sum is σ = 75840. Its totient is φ = 61776.

The previous prime is 68597. The next prime is 68611. The reversal of 68609 is 90686.

68609 is nontrivially palindromic in base 5 and base 16.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68609 - 2¹² = 64513 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 359 + ... + 515.

It is an arithmetic number, because the mean of its divisors is an integer number (9480).

It is a Proth number, since it is equal to 67 ⋅ 2¹⁰ + 1 and 67 < 2¹⁰.

2⁶⁸⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

68609 is a deficient number, since it is larger than the sum of its proper divisors (7231).

68609 is a wasteful number, since it uses less digits than its factorization.

68609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 68609 is about 261.9331975905. The cubic root of 68609 is about 40.9380384716.

The spelling of 68609 in words is "sixty-eight thousand, six hundred nine".