-
infinitely many
sphenic numbers. A
sphenic number is a
product pqr
where p, q, and r are
three distinct prime numbers. In
other words, the
sphenic numbers are...
- number,
happy number 902 = 2 × 11 × 41,
sphenic number, nontotient,
Harshad number 903 = 3 × 7 × 43,
sphenic number, 42nd
triangular number, Schröder–Hipparchus...
-
function returns 0,
Member of the Mian–Chowla sequence. 402 = 2 × 3 × 67,
sphenic number, nontotient,
Harshad number,
number of
graphs with 8
nodes and 9...
- 66,
number of non-isomorphic set-systems of
weight 9 606 = 2 × 3 × 101,
sphenic number, sum of six
consecutive primes (89 + 97 + 101 + 103 + 107 + 109)...
- [citation needed] 805 = 5 × 7 × 23,
sphenic number,
number of
partitions of 38 into
nonprime parts 806 = 2 × 13 × 31,
sphenic number, nontotient,
totient sum...
- and ones. 321 = 3 × 107, a
Delannoy number 322 = 2 × 7 × 23. 322 is a
sphenic, nontotient, untouchable, and a
Lucas number. It is also the
first unprimeable...
- in the OEIS), area code for the Charlotte, NC area. 705 = 3 × 5 × 47,
sphenic number,
smallest Bruckman-Lucas
pseudoprime (sequence A005845 in the OEIS)...
-
number and the only
nontrivial Fibonacci number that is a
perfect cube.
Sphenic numbers always have
exactly eight divisors. 8 is the base of the octal...
-
pyramidal number 3080 –
pronic number 3081 –
triangular number, 497th
sphenic number 3087 – sum of
first 40
primes 3109 – super-prime 3119 – safe prime...
-
natural number following 254 and
preceding 256. Its
factorization makes it a
sphenic number.
Since 255 = 28 – 1, it is a
Mersenne number (though not a pernicious...
