Number of the day: 72737033

Properties of the number 72737033:

72737033 is a cyclic number.
72737033 = 17 × 4278649 is semiprime and squarefree.
72737033 has 2 distinct prime factors, 4 divisors, 37 antidivisors and 68458368 totatives.
Reversing the decimal digits of 72737033 results in an emirpimes.
72737033 = 36368517² - 36368516² = 2139333² - 2139316² is the difference of 2 nonnegative squares in 2 ways.
72737033 is the difference of 2 positive pentagonal numbers in 2 ways.
72737033 = 2248² + 8227² = 1888² + 8317² is the sum of 2 positive squares in 2 ways.
72737033 = 26² + 209² + 8526² is the sum of 3 positive squares.
72737033² = 36988592² + 62630025² = 34229192² + 64179735² = 31404992² + 65607945² = 3164040² + 72668183² is the sum of 2 positive squares in 4 ways.
72737033² is the sum of 3 positive squares.
72737033 is a proper divisor of 1931¹³⁶⁴⁸ - 1.
72737033 = '7273' + '7033' is the concatenation of 2 semiprime numbers.
72737033 is an emirpimes in (at least) the following bases: 6, 7, 10, 11, 14, 17, 20, 22, 27, 31, 33, 36, 37, 45, 47, 48, 49, 55, 56, 63, 68, 70, 75, 78, 82, 83, 84, 87, 89, 90, 95, 97, and 99.