Search a number
Cunningham n.  and  deficient n.

First numbers that belong to both sets:

3, 5, 7, 8, 9, 10, 15, 17, 26, 31, 33, 35, 37, 50, 63, 65, 82, 99, 101, 122, 124, 127, 129, 143, 145, 170, 195, 197, 215, 217, 226, 242, 244, 255, 257, 290, 323, 325, 344, 362, 399, 401, 442, 483, 485, 511, 513, 530, 575, 577, 626, 675, 677, 730, 783, 785, 842, 899, 901, 962, 999, 1001, 1023, 1025, 1090, 1155, 1157, 1226, 1295, 1297, 1370, 1443, 1445, 1522, 1599, 1601, 1682, 1727, 1729, 1763, 1765, 1850, 1935, 1937, 2026, 2047, 2049, 2115, 2117, 2186, 2188, 2198, 2303, 2305, 2402, 2499, 2501, 2602, 2703, 2705, 2743, 2745, 2810, 2915, 2917, 3026, 3124, 3135, 3137, 3363, 3365, 3374, 3376, 3482, 3599, 3601, 3722, 3843, 3845, 3970, 4097, 4226, 4355, 4357, 4490, 4623, 4625, 4762, 4899, 4901, 4912, 5042, 5183, 5185, 5330, 5475, 5477, 5626, 5777, 5831, 5833, 5930, 6083, 6085, 6242, 6399, 6401, 6562, 6723, 6725, 6890, 7055, 7057, 7226, 7395, 7397, 7570, 7743, 7745, 7775, 7777, 7922, 7999, 8001, 8099, 8101, 8191, 8193, 8282, 8463, 8465, 8648, 8650, 8835, 8837, 9026, 9215, 9217, 9262, 9410, 9603, 9605, 9802, 9999, 10001, 10202, 10403, 10405, 10610, 10647, 10649, 10815, 10817, 11026, 11235, 11237, 11450, 11663, 11665, 11882, 12099, 12101, 12166, 12322, 12543, 12545, 12770, 12995, 12997, 13226, 13455, 13457, 13688, 13690, 13823, 13825, 13923, 13925, 14162, 14399, 14401, 14642, 14883, 14885, 15128, 15130, 15375, 15377, 15626, 15875, 15877, 16130, 16383, 16385, 16642, 16899, 16901, 17162, 17423, 17425, 17575, 17577, 17690, 17957, 18226, 18495, 18497, 18770, 19043, 19045, 19322, 19599, 19601, 19682, 19882, 20163, 20165, 20450, 20735, 20737, 21026, 21315, 21317, 21608, 21610, 21903, 21905, 21951, 21953, 22202, 22499, 22501, 22802, 23103, 23105, 23410, 23715, 23717, 24026, 24335.

Some larger examples :