68605 has 4 divisors (see below), whose sum is σ = 82332. Its totient is φ = 54880.

The previous prime is 68597. The next prime is 68611. The reversal of 68605 is 50686.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50686 = 2 ⋅25343.

It can be written as a sum of positive squares in 2 ways, for example, as 19321 + 49284 = 139^2 + 222^2 .

It is not a de Polignac number, because 68605 - 2³ = 68597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6856 + ... + 6865.

It is an arithmetic number, because the mean of its divisors is an integer number (20583).

2⁶⁸⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

68605 is a deficient number, since it is larger than the sum of its proper divisors (13727).

68605 is a wasteful number, since it uses less digits than its factorization.

68605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13726.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 68605 is about 261.9255619446. The cubic root of 68605 is about 40.9372428747.

The spelling of 68605 in words is "sixty-eight thousand, six hundred five".