Number of the day: 9992109

Joseph Liouville was born on this day 212 years ago.

Properties of the number 9992109:

9992109 = 3 × 37 × 90019 is a sphenic number and squarefree.
9992109 has 3 distinct prime factors, 8 divisors, 19 antidivisors and 6481296 totatives.
9992109 has an emirpimes digit sum 39 in base 10.
Reversing the decimal digits of 9992109 results in a sphenic number.
9992109 = 4996055² - 4996054² = 1665353² - 1665350² = 135047² - 135010² = 45065² - 44954² is the difference of 2 nonnegative squares in 4 ways.
9992109 is the sum of 2 positive triangular numbers.
9992109 is the difference of 2 positive pentagonal numbers in 2 ways.
9992109 = 208² + 227² + 3146² is the sum of 3 positive squares.
9992109² = 3240684² + 9451995² is the sum of 2 positive squares in 1 way.
9992109² is the sum of 3 positive squares.
9992109 is a proper divisor of 1231⁹ - 1.
9992109 = '9' + '992109' is the concatenation of 2 semiprime numbers.