List of numbers — Integers
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2 E9
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5 E9
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| Cardinal
| four billion, two hundred [and] ninety-four million, nine hundred [and] sixty-seven thousand, two hundred [and] ninety-seven
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| Ordinal
| 4,294,967,297th (four billion, two hundred [and] ninety-four million, nine hundred [and] sixty-seven thousand, two hundred [and] ninety-seventh)
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| Factorization
| <math> 641 \cdot 6,700,417 <math>
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| Divisors
| 641, 6,700,417
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| Roman numeral
| <math>\overline\overline\overline\mbox{IV} \overline\overline\mbox{CCXCIV} \overline\mbox{CMLXVII} \mbox{CCXCVII}<math>
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| Binary
| 100000000000000000000000000000001
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| Octal
| 40000000001
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| Duodecimal
| 9BA461595
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| Hexadecimal
| 100000001
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4,294,967,297 is the number after 4294967296 and before 4294967298. It is the smallest Fermat number that is not prime.
Fermat conjectured in 1637 that all numbers of the form <math>F_n = 2^{2^n}+1<math> are prime. Euler disproved this in 1732 by factorizing F5=4,294,967,297 into 641 and 6,700,417.
It does belong in an infinite coprime sequence defined by recursion. (Sloane A002716). It is also a member of the Pisot sequence L(5,9). (Sloane A020737).
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