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68327845 = 517803857
BaseRepresentation
bin1000001001010…
…01100110100101
311202120102011221
410010221212211
5114442442340
610440300341
71456530355
oct404514645
9152512157
1068327845
11356297a3
121aa716b1
13112046a1
149108b65
155eea44a
hex41299a5

68327845 has 8 divisors (see below), whose sum is σ = 86816664. Its totient is φ = 51446784.

The previous prime is 68327843. The next prime is 68327851. The reversal of 68327845 is 54872386.

It can be written as a sum of positive squares in 4 ways, for example, as 24860196 + 43467649 = 4986^2 + 6593^2 .

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 68327845 - 21 = 68327843 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68327843) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 401844 + ... + 402013.

It is an arithmetic number, because the mean of its divisors is an integer number (10852083).

Almost surely, 268327845 is an apocalyptic number.

It is an amenable number.

68327845 is a deficient number, since it is larger than the sum of its proper divisors (18488819).

68327845 is a wasteful number, since it uses less digits than its factorization.

68327845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803879.

The product of its digits is 322560, while the sum is 43.

The square root of 68327845 is about 8266.0658719853. The cubic root of 68327845 is about 408.8204148190.

The spelling of 68327845 in words is "sixty-eight million, three hundred twenty-seven thousand, eight hundred forty-five".

Divisors: 1 5 17 85 803857 4019285 13665569 68327845