### About the Number 423 (four hundred twenty-three)

423 was the smallest number without a nBAB on 7 May 2017.

```MathBabbler Number Analyst (MBNA) output:
=========================================
423 is natural, counting, whole, integer
423 is odd (not even)
423 is not extremely odd
423 proper divisors are: 1,3,9,47,141,
423 has 5 proper divisors
423 is deficient (sum of divisors is 201; ratio: 0.475177)
423 is unhappy
423 is not a Squarefree Number: 9,
423 is Harshad (Niven) number
423 is composite (not prime)
423 has the prime factors: 3*3*47 (sum=53)
423 is a 47-smooth number
423 is a Moran Number
423 is the sum of 13 consecutive primes
423 = 11 + 13 + 17 + 19 + 23 + 29 + 31 + 37 + 41 + 43 + 47 + 53 + 59
423 in octal is 0647
423 in hexadecimal is 0x1a7
423 in binary is 110100111 (is evil)
423 nearest square numbers: -23...18 (400...441 )
sqrt(423) = 20.567
ln(423) = 6.04737
log(423) = 2.62634
423! is 8.86656e+928
423 is 134.645 Pi years
423 is 21 score and 3 years
423 written as a Roman numeral is CDXXIII
423 is 212^2 - 211^2 and 212 + 211 = 423
423 is a multiple of 3 & it contains a 3 (A121023)
______________________________________________
423 reciprocal is 0.0023640661938534278959810874704491725768321513
remainders:
1,10,100,154,271,172,28,280,262,82,397,163,361,226,145,181,118,334,379,406,253,415,343,46,37,370,316,199,298,19,190,208,388,73,307,109,244,325,289,352,136,91,64,217,55,127,1
```

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 07 May 2017 