239785

Appears in sequences

• The first of three consecutive heptagonal numbers the sum of which is equal to the sum of three consecutive primes.at n=9A298301
• Heptagonal numbers which are products of five distinct primes.at n=5A353019
• a(n) is the smallest number m with n divisors d such that d^m mod m = d.at n=14A371513
• a(n) is the least k that has exactly n proper divisors d such that (-d)^k == -d (mod k).at n=14A380393