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A069709 Primes with arithmetic mean of digits an integer (sum of digits = a multiple of number of digits). 9
2, 3, 5, 7, 11, 13, 17, 19, 31, 37, 53, 59, 71, 73, 79, 97, 1021, 1061, 1069, 1087, 1151, 1201, 1223, 1249, 1289, 1429, 1447, 1483, 1487, 1511, 1559, 1601, 1609, 1627, 1663, 1667, 1753, 1847, 1861, 1933, 1951, 1973, 1999, 2011, 2099, 2141, 2213, 2239, 2293 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..49.

MATHEMATICA

Do[p = Prime[n]; If[ IntegerQ[ Apply[ Plus, IntegerDigits[p]] / Floor[ Log[10, p] + 1]], Print[p]], {n, 1, 10^3}]

Select[Prime[Range[400]], IntegerQ[Mean[IntegerDigits[#]]]&] (* Harvey P. Dale, Jan 29 2012 *)

CROSSREFS

Cf. A069710, A069711, A069712.

Sequence in context: A002200 A181561 A216496 * A144755 A069090 A321150

Adjacent sequences:  A069706 A069707 A069708 * A069710 A069711 A069712

KEYWORD

nonn,base

AUTHOR

Amarnath Murthy, Apr 08 2002

EXTENSIONS

Edited and extended by Robert G. Wilson v, Apr 12 2002

STATUS

approved

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Last modified October 16 06:26 EDT 2019. Contains 328050 sequences. (Running on oeis4.)