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economical n.  and  iban n.

First numbers that belong to both sets:

1, 2, 3, 7, 10, 11, 14, 17, 21, 23, 27, 41, 43, 47, 71, 73, 101, 103, 107, 111, 112, 121, 122, 123, 127, 141, 142, 147, 173, 177, 201, 203, 211, 217, 223, 224, 227, 241, 243, 271, 277, 301, 307, 311, 317, 320, 343, 347, 371, 373, 401, 421, 427, 443, 701, 727, 743, 773, 1000, 1003, 1007, 1011, 1021, 1022, 1024, 1027, 1041, 1042, 1043, 1047, 1072, 1073, 1077, 1101, 1103, 1107, 1114, 1117, 1120, 1121, 1123, 1127, 1141, 1142, 1147, 1171, 1174, 1201, 1202, 1203, 1207, 1211, 1214, 1217, 1223, 1227, 1241, 1247, 1271, 1273, 1277, 1301, 1303, 1307, 1312, 1317, 1321, 1322, 1323, 1327, 1343, 1344, 1347, 1371, 1372, 1373, 1377, 1401, 1402, 1403, 1407, 1411, 1421, 1423, 1424, 1427, 1447, 1471, 1472, 1473, 1477, 1701, 1707, 1711, 1714, 1721, 1723, 1741, 1743, 1747, 1774, 1777, 2000, 2003, 2011, 2017, 2021, 2023, 2027, 2047, 2073, 2077, 2103, 2107, 2111, 2117, 2127, 2141, 2143, 2144, 2173, 2177, 2201, 2203, 2207, 2217, 2221, 2240, 2241, 2243, 2271, 2272, 2273, 2303, 2304, 2307, 2311, 2317, 2341, 2347, 2371, 2377, 2401, 2403, 2407, 2411, 2417, 2423, 2427, 2441, 2443, 2447, 2471, 2473, 2477, 2701, 2707, 2711, 2721, 2723, 2741, 2744, 2747, 2773, 2777, 3001, 3007, 3011, 3017, 3023, 3041, 3071, 3072, 3073, 3101, 3104, 3121, 3127, 3143, 3200, 3203, 3217, 3221, 3227, 3241, 3271, 3301, 3307, 3321, 3323, 3343, 3347, 3371, 3373, 3402, 3403, 3407, 3701, 3703, 3712, 3721, 3727, 3773, 4000, 4001, 4003, 4007, 4021, 4027, 4073, 4107, 4111, 4127, 4171, 4177, 4201, 4207, 4211, 4217, 4241, 4243, 4271, 4273, 4307, 4327, 4373, 4374, 4417, 4421, 4423, 4441, 4447, 4703, 4711, 4717, 4721, 4723, 7001, 7027, 7043.

Some larger examples :