Anyone good at faking arithmancy/numerology?

I have a phrase of 13 words, 15 syllables, 54 letters. The letter numbers (a=1, b=2 etc.) add up to 682 692 if I haven't messed up my maths. I'd rather not quote it here because spoilers for forthcoming chapters, but if anyone thinks it would help send me a personal message.

For Harry Potter story purposes I need some sort of MAJOR arcane arithmantical significance in the numbers etc. - I'm guessing that Arithmancy works something like a more complex version of numerology, but I'm quite happy for it to be some other sort of mathematical progresson or something. Any suggestions?

Later - correct total is 692, my bad. Comes from a background in physics and biology, not maths, it's the right order of magnitude...
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