103 (number)

103 (one hundred [and] three) is the natural number following 102 and preceding 104.

← 102 103 104 →
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Cardinal	one hundred three
Ordinal	103rd (one hundred third)
Factorization	prime
Prime	27th
Greek numeral	ΡΓ´
Roman numeral	CIII
Binary	11001112
Ternary	102113
Octal	1478
Duodecimal	8712
Hexadecimal	6716

In mathematics

103 is the 27th prime number. The previous prime is 101, making them both twin primes. It is also a happy number.[1]

103 is a strictly non-palindromic number.[2]

103 is the smallest prime number in which the period length of its reciprocal is exactly 1/3 of the maximum length.

In science

• The atomic number of lawrencium, an actinide.

In other fields

When "and" is required for the number name, 103 is the smallest number requiring 18 letters when spelled out in English.

One hundred three is also:

• The emergency telephone number for ambulance in Belarus, India and Ukraine

See also

• List of highways numbered 103
• 103rd Street (disambiguation), multiple rapid transit stations

References

• Wells, D. The Penguin Dictionary of Curious and Interesting Numbers London: Penguin Group. (1987): 133

1. "Sloane's A007770 : Happy numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-27.
2. "Sloane's A016038 : Strictly non-palindromic numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-27.