Numbers 730,000s

A page of the Numeropedia - the Special Encyclopedia of Numbers

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739,391 & 739,393

[Math.] A right-truncatable prime number: self, 73939, 7393, 739, 73 and 7 are prime numbers.

 

739,397

[Math.] A bi-truncatable prime number: self, 73939, 7393, 739, 73 and 7 are prime numbers and so are 39397, 9397, 397, 97 and 7.

Three of its cyclic permutations are also prime numbers: 773939, 939773 and 393977.

 

739,399

[Math.] A right-truncatable prime number: self, 73939, 7393, 739, 73 and 7 are prime numbers.