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67945 = 5107127
BaseRepresentation
bin10000100101101001
310110012111
4100211221
54133240
61242321
7402043
oct204551
9113174
1067945
1147059
12333a1
1324c07
141aa93
15151ea
hex10969

67945 has 8 divisors (see below), whose sum is σ = 82944. Its totient is φ = 53424.

The previous prime is 67943. The next prime is 67957. The reversal of 67945 is 54976.

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 67945 - 21 = 67943 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67943) 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 7 ways as a sum of consecutive naturals, for example, 472 + ... + 598.

It is an arithmetic number, because the mean of its divisors is an integer number (10368).

267945 is an apocalyptic number.

It is an amenable number.

67945 is a deficient number, since it is larger than the sum of its proper divisors (14999).

67945 is a wasteful number, since it uses less digits than its factorization.

67945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239.

The product of its digits is 7560, while the sum is 31.

The square root of 67945 is about 260.6626171893. The cubic root of 67945 is about 40.8055435887.

Adding to 67945 its sum of digits (31), we get a palindrome (67976).

The spelling of 67945 in words is "sixty-seven thousand, nine hundred forty-five".

Divisors: 1 5 107 127 535 635 13589 67945