Number of the day: 85117407

Properties of the number 85117407:

85117407 = 3 × 29 × 887 × 1103 is the 80167311^th composite number and is squarefree.
85117407 has 4 distinct prime factors, 16 divisors, 23 antidivisors and 54676832 totatives.
85117407 has a semiprime digit sum 33 in base 10.
85117407 = 42558704² - 42558703² = 14186236² - 14186233² = 1467556² - 1467527² = 489224² - 489137² = 48424² - 47537² = 39136² - 38033² = 17324² - 14663² = 14516² - 11207² is the difference of 2 nonnegative squares in 8 ways.
85117407 is the sum of 2 positive triangular numbers.
85117407 is the difference of 2 positive pentagonal numbers in 4 ways.
85117407 is not the sum of 3 positive squares.
85117407² = 58701660² + 61636743² is the sum of 2 positive squares in 1 way.
85117407² is the sum of 3 positive squares.
85117407 is a divisor of 349²⁵⁶⁹⁴ - 1.
85117407 = '85' + '117407' is the concatenation of 2 emirpimes.