Number of the day: 90251429

Properties of the number 90251429:

90251429 is a cyclic number.
90251429 = 89 × 1014061 is semiprime and squarefree.
90251429 has 2 distinct prime factors, 4 divisors, 19 antidivisors and 89237280 totatives.
Reversing the decimal digits of 90251429 results in a prime.
90251429 = 45125715² - 45125714² = 507075² - 506986² is the difference of 2 nonnegative squares in 2 ways.
90251429 is the difference of 2 positive pentagonal numbers in 2 ways.
90251429 = 5390² + 7823² = 4670² + 8273² is the sum of 2 positive squares in 2 ways.
90251429 = 23² + 30² + 9500² is the sum of 3 positive squares.
90251429² = 46633629² + 77269820² = 39548379² + 81124880² = 32147229² + 84331940² = 8058060² + 89890979² is the sum of 2 positive squares in 4 ways.
90251429² is the sum of 3 positive squares.
90251429 is a proper divisor of 1301⁶⁷⁶⁰⁴ - 1.
90251429 is an emirpimes in (at least) the following bases: 11, 15, 17, 25, 26, 33, 34, 35, 38, 41, 42, 45, 47, 49, 57, 58, 70, 71, 73, 74, 75, 79, 82, 84, 85, 87, 88, 90, 94, 95, and 98.