(medicine) heart rate

(mathematics) number line

(number theory) abundant number, a number that is smaller than the sum of its proper divisors

(number theory) perfect number, a positive integer that is equal to the sum of its positive divisors, excluding the number itself

(number theory) deficient number, a number for which the sum of proper divisors is less than that number

(number theory) amicable numbers, two different numbers related in such a way that the sum of the proper divisors of each is equal to the other number.

(Internet) play count

unlucky number

a thousand, 1000

to be achieved; to be completed / to become; to change into / (impersonal) to reach a time; to get to a timepoint / to reach an amount/quantity / (with negative) to be acceptable; to be tolerable