### About the Number 154 (one hundred fifty-four)

While working on a nBAB for the number 153, MathBabbler observed from the MBNA output for 153 that it was a Ruth-Aaron Pair with the number `154`.

```   MathBabbler Number Analyst (MBNA) output:
=========================================
154 is a natural, whole, integer
154 is even
154 proper divisors are: 1,2,7,11,14,22,77,
154 is deficient (sum of divisors is 134)
154 is unhappy
154 is not a Harshad number
154 is not prime
154 has the prime factors: 2*7*11 (sum=20)
154 is sphenic (had 3 unique prime factors)
154 sum of prime factors is: 20
154 and 153 are a Ruth-Aaron pair (distinct prime factors)
154 in octal is 0232
154 in hexadecimal is 0x9a
154 in binary is 10011010 (is evil)
154 nearest square numbers: -10...15 (144...169 )
sqrt(154) = 12.4097
ln(154) = 5.03695
log(154) = 2.18752
154 reciprocal is .00649350649350649350649350649350
154! is 3.08977e+271
154 is 49.0197 Pi years
154 is 7 score and 14 years
154 written as a Roman numeral is CLIV
```

`154`7 is repdigit 8810.

```   1 * 7^2 = 49; 5 * 7^1 = 35; 4 * 7^0 =  4
49 + 35 + 4 = 88
```

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 10 July 2009 