Number of the day: 65919

Properties of the number 65919:

65919 = 3 × 7 × 43 × 73 is the 59336^th composite number and is squarefree.
65919 has 4 distinct prime factors, 16 divisors, 15 antidivisors and 36288 totatives.
65919 has a sphenic digit sum 30 in base 10.
65919 has an oblong digit sum 30 in base 10.
65919 = 62² + … + 75² is the sum of at least 2 consecutive positive squares in 1 way.
65919 = 32960² - 32959² = 10988² - 10985² = 4712² - 4705² = 1580² - 1559² = 788² - 745² = 488² - 415² = 320² - 191² = 260² - 41² is the difference of 2 nonnegative squares in 8 ways.
65919 is the sum of 2 positive triangular numbers.
65919 is the difference of 2 positive pentagonal numbers in 3 ways.
65919 is not the sum of 3 positive squares.
65919² = 43344² + 49665² is the sum of 2 positive squares in 1 way.
65919² is the sum of 3 positive squares.
65919 is a proper divisor of 1597³ - 1.
65919 = '659' + '19' is the concatenation of 2 prime numbers.
65919 = '6' + '5919' is the concatenation of 2 semiprime numbers.
65919 in base 60 = IId and consists of only the digits 'I' and 'd'.

The number 65919 belongs to the following On-Line Encyclopedia of Integer Sequences (OEIS) sequences (among others):

Sequence numbers and descriptions below are taken from OEIS.
A129212: Numbers n such that n^3 divides 4^(n^2)-1.
A186570: T(n,k)=Number of (n+2)X(k+2) 0..5 arrays with every 3X3 subblock commuting with each horizontal and vertical neighbor 3X3 subblock
A249614: Integers that reach the (47360, 29127) cycle described in A234534, after iterations of numerator(sigma(n)/n) = A017665(n).