Arabic to Roman
978
Christmas Trees
531
Divisors
911941
Evil Numbers
820
Fibonacci
859
933679
Happy Numbers
805
Leap Years
930
Niven Numbers
721
Odious Numbers
947
Pascal’s Triangle
723
Pernicious Numbers
864
Prime Numbers
830987
640
Prime Numbers (Long)
974
Quine
607962
945
Roman to Arabic
Spelling Numbers
1,000
λ
500
π
890
974864
τ
823
966769
φ
759
√2
871
𝑒
665882912799605