68009 has 4 divisors (see below), whose sum is σ = 69504. Its totient is φ = 66516.

The previous prime is 67993. The next prime is 68023. The reversal of 68009 is 90086.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68009 - 2⁴ = 67993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 677 + ... + 770.

It is an arithmetic number, because the mean of its divisors is an integer number (17376).

2⁶⁸⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

68009 is a deficient number, since it is larger than the sum of its proper divisors (1495).

68009 is a wasteful number, since it uses less digits than its factorization.

68009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1494.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 68009 is about 260.7853523494. The cubic root of 68009 is about 40.8183516699.

The spelling of 68009 in words is "sixty-eight thousand, nine".