Number of the day: 60979

Felix Klein was born on this day 170 years ago.

Andrey Kolmogorov was born on this day 116 years ago.

Properties of the number 60979:

60979 = 17² × 211 is the 54833^th composite number and is not squarefree.
60979 has 2 distinct prime factors, 6 divisors, 13 antidivisors and 57120 totatives.
60979 has an emirp digit sum 31 in base 10.
Reversing the decimal digits of 60979 results in a semiprime.
60979 = 30490² - 30489² = 1802² - 1785² = 250² - 39² is the difference of 2 nonnegative squares in 3 ways.
60979 is the sum of 2 positive triangular numbers.
60979 is the difference of 2 positive pentagonal numbers in 2 ways.
60979 = 83² + 117² + 201² is the sum of 3 positive squares.
60979² = 33971² + 50640² = 28696² + 53805² is the sum of 2 positive squares in 2 ways.
60979² is the sum of 3 positive squares.
60979 is a proper divisor of 829¹² - 1.
60979 is palindromic in (at least) base -46.
60979 in base 16 = ee33 and consists of only the digits '3' and 'e'.

The number 60979 belongs to the following On-Line Encyclopedia of Integer Sequences (OEIS) sequence (among others):

Sequence number and description below are taken from OEIS.
A050842: Numbers k such that 181*2^k-1 is prime.