8181

Properties by base:

More about this number at Positiv Integers and Number Empire.

The number is not a prime.

Its 5 (2 unique) factors are:
3⁴ = 81
101

Its 10 divisors are:
1
3
9
27
81
101
303
909
2727
8181
Its aliquote sum is:
4161
makeing it a deficient number.

The number appears at position 7431 of the decimal digits of π surrounded by
74353632569160781547818115284366795706110861 Source: The Pi-Search Page

Computations done with Math::BigInt 1.999811 and Math::Pari 2.030523 based on PARI/GP 2.11.3 (elapsed: 797.35ms; cpu: 81.1939999999964ms)