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68104109 = 731078719
BaseRepresentation
bin1000000111100…
…10111110101101
311202011001021102
410003302332231
5114413312414
610431412445
71454606153
oct403627655
9152131242
1068104109
1135496697
121a984125
13111568b8
14908b3d3
155ea3ede
hex40f2fad

68104109 has 8 divisors (see below), whose sum is σ = 69690240. Its totient is φ = 66535776.

The previous prime is 68104079. The next prime is 68104129. The reversal of 68104109 is 90140186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-68104109 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 (68104129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3452 + ... + 12170.

It is an arithmetic number, because the mean of its divisors is an integer number (8711280).

Almost surely, 268104109 is an apocalyptic number.

It is an amenable number.

68104109 is a deficient number, since it is larger than the sum of its proper divisors (1586131).

68104109 is a wasteful number, since it uses less digits than its factorization.

68104109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8899.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 68104109 is about 8252.5213722837. The cubic root of 68104109 is about 408.3737064435.

The spelling of 68104109 in words is "sixty-eight million, one hundred four thousand, one hundred nine".

Divisors: 1 73 107 7811 8719 636487 932933 68104109