MathBabbler came across a BARS that was created for a road sign in which no math was found. One week earlier, a BARS was chosen for BOTW that had a sign for which no math was initially found. In both cases the number 87 was the source of the problem.

MathBabbler Number Analyst (MBNA) output: ========================================= 87 is a natural, whole, integer 87 is odd 87 proper divisors are: 1,3,29, 87 is deficient (sum of divisors is 33) 87 is unhappy 87 is not a Harshad number 87 is not prime 87 is undulating 87 has the prime factors: 3*29 87 in octal is 0127 87 in hexadecimal is 0x57 87 in binary is 1010111 (is odious) 87 nearest square numbers: -6...13 (81 [9] ...100 [10]) sqrt(87) = 9.32738 ln(87) = 4.46591 log(87) = 1.93952 87 reciprocal is .01149425287356321839080459770114 87! is 2.10776e+132 87 is 27.693 Pi years 87 is 4 score and 7 years

`in Roman numeral is`

87`.`

LXXXVIIThe Wikipedia said:

`is the sum of the squares of the first four primes.`

872^2 + 3^2 + 5^2 + 7^2 = 4 + 9 + 25 + 49 = 87The Wikipedia also said:

`is the sum of the sum of divisors of the first ten integers.`

871: 1 2: 1 + 2 = 3 3: 1 + 3 = 4 4: 1 + 2 + 4 = 7 5: 1 + 5 = 6 6: 1 + 2 + 3 + 6 = 12 7: 1 + 7 = 8 8: 1 + 2 + 4 + 8 = 15 9: 1 + 3 + 9 = 13 10: 1 + 2 + 5 + 10 = 18 1 + 3 + 4 + 7 + 6 + 12 + 8 + 15 + 13 + 18 = 87

**Creator:** Gerald Thurman
[gthurman@gmail.com]

**Created:** 17 October 2008

This work is licensed under a Creative Commons Attribution 3.0 United States License.