Although the time launch was officially 14:13 EST it was actually at 13:13 Houston time where mission control was.
The launch date of 11th April 1970 when written as 11/4/70 the individual numerals 1+1+4+7 add up to....
I'm sure one could find quite a few if you look for them
I've always been aware of the symbolism of the number 13 of that Apollo mission but I was never previously aware that the explosion also happened on the 13th.