Search a number
-
+
68485 = 513697
BaseRepresentation
bin10000101110000101
310110221111
4100232011
54142420
61245021
7403444
oct205605
9113844
1068485
11474aa
1233771
1325231
141ad5b
151545a
hex10b85

68485 has 4 divisors (see below), whose sum is σ = 82188. Its totient is φ = 54784.

The previous prime is 68483. The next prime is 68489. The reversal of 68485 is 58486.

68485 = T112 + T113 + ... + T121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58486 = 229243.

It can be written as a sum of positive squares in 2 ways, for example, as 10404 + 58081 = 102^2 + 241^2 .

It is a cyclic number.

It is not a de Polignac number, because 68485 - 21 = 68483 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68483) 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, 6844 + ... + 6853.

It is an arithmetic number, because the mean of its divisors is an integer number (20547).

268485 is an apocalyptic number.

It is an amenable number.

68485 is a deficient number, since it is larger than the sum of its proper divisors (13703).

68485 is a wasteful number, since it uses less digits than its factorization.

68485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13702.

The product of its digits is 7680, while the sum is 31.

The square root of 68485 is about 261.6963889701. The cubic root of 68485 is about 40.9133605719.

Subtracting from 68485 its reverse (58486), we obtain a palindrome (9999).

The spelling of 68485 in words is "sixty-eight thousand, four hundred eighty-five".

Divisors: 1 5 13697 68485