827700

Appears in sequences

• Larger of unitary amicable pair.at n=15A002953
• Unitary amicable numbers.at n=36A063991
• Numbers n such that phi(reversal(n)) = reversal(phi(n)). Ignore leading 0's.at n=32A069282
• Larger of modified exponential amicable pairs.at n=28A323759
• Larger of tri-unitary amicable numbers pair: numbers (m, n) such that tsigma(m) = tsigma(n) = m + n, where tsigma(n) is the sum of the tri-unitary divisors of n (A324706).at n=34A324709