f.ID.describe()

count       7583.000000
mean      704013.191613
std      1192979.985253
min        10575.000000
25%        10575.000000
50%        10864.000000
75%      2084161.000000
max      6422339.000000

count      7583
unique       68
top       10864
freq       3390

f.ID.astype(str).describe()