27683 is a sphenic numbers in which all three primes are weak since 19 is closer to 17 than 23, 31 is closer to 29 than 37 and 47 is closer to 43 than 53. See blog post Triple Strength Sphenic Numbers And More.

The sequence begins:

1729, 2093, 2821, 3059, 3913, 4123, 4277, 4991, 5551, 5681, 5719, 6251, 6643, 6923, 7553, 7567, 7657, 8099, 8113, 9269, 9331, 9373, 9709, 9821, 9919, 10199, 10283, 10621, 11039, 11609, 11753, 11837, 11921, 12649, 12857, 13237, 13363, 13547, 13699, 13741, 14053, 14147, 14329, 14497, 15029, 15067, 15197, 15841, 16471, 16583, 17329, 17423, 17549, 17563, 18011, 18031, 18109, 18193, 18239, 18361, 18487, 18791, 18941, 19313, 20069, 20083, 20501, 20539, 20839, 21091, 21203, 21827, 21931, 21973, 21983, 22211, 22351, 22379, 23653, 24017, 24073, 24311, 24521, 24583, 24661, 24817, 24983, 25327, 25441, 25669, 25753, 26273, 26467, 26611, 26657, 26663, 26789, 26887, 26923, 27307, 27683, 27911, 28427, 28483, 28847, 29141, 29281, 29419, 30163, 30457, 30659, 30667, 30797, 30989, 31003, 31073, 31171, 31759, 31901, 32039, 32053, 32123, 32357, 32591, 32669, 32767, 32809, 33449, 33511, 33787, 33887, 34013, 34099, 34333, 34853, 35399, 35441, 35861, 35867, 35929, 36043, 36239, 36271, 36491, 36869, 37177, 37219, 37271, 37297, 37513, 37639, 38003, 38311, 38399, 38801, 38893, 38969, 39169, 39277, 39403, 39431

27683 is a cyclic and Duffinian number.

27683 can be rendered as a digit equation as follows:

-2 + 7 + 6 = 8 + 3