Number of the day: 4079899757679

Ky Fan was born on this day 102 years ago.

Properties of the number 4079899757679:

4079899757679 = 3 × 89 × 409 × 2549 × 14657 is composite and squarefree.
4079899757679 has 5 distinct prime factors, 32 divisors, 43 antidivisors and 2681561186304 totatives.
4079899757679 has a semiprime digit sum 87 in base 10.
4079899757679 is the difference of 2 nonnegative squares in 16 ways.
4079899757679 is the sum of 2 positive triangular numbers.
4079899757679 is the difference of 2 positive pentagonal numbers in 7 ways.
4079899757679 is not the sum of 3 positive squares.
4079899757679² = 2848688289996² + 2920711738455² = 1956370892265² + 3580250684604² = 1866385605804² + 3627972822825² = 2726197646871² + 3035362980420² = 2101914933300² + 3496789333929² = 1715647242729² + 3701639713860² = 2519779574295² + 3208783715004² = 2328266219196² + 3350337064425² = 1467432194985² + 3806865480396² = 2790934521696² + 2975948004975² = 2026121093745² + 3541244886504² = 897955895535² + 3979856434896² = 2785127581071² + 2981383301400² = 1787821242129² + 3667325624880² = 633151664271² + 4030471560840² = 2582145857775² + 3158813828304² = 1541714843505² + 3777392933496² = 365582767215² + 4063487575104² = 2095093917225² + 3500880390804² = 975736124055² + 3961504896996² = 229505533335² + 4073439485604² = 1859309293929² + 3631604463900² = 711974078871² + 4017296969820² = 498028781271² + 4049388764460² = 1615405970025² + 3746471084196² = 445103188695² + 4055547458004² = 764377379415² + 4007656329396² = 2443244799996² + 3267435826455² = 1377057255804² + 3840481134825² = 189661737996² + 4075488983895² = 2222117576580² + 3421662681879² = 1120411859700² + 3923042097321² = 79912015980² + 4079117073879² = 1991287445004² + 3560948798295² = 858874169196² + 3988473040425² = 349136832996² + 4064933640855² = 1452015663504² + 3812772291345² = 269450976696² + 4070992287375² = 936830666496² + 3970885333905² = 1197036603720² + 3900344267121² is the sum of 2 positive squares in 40 ways.
4079899757679² is the sum of 3 positive squares.
4079899757679 is a divisor of 1433⁴⁶⁶⁷⁵² - 1.
4079899757679 = '407989' + '9757679' is the concatenation of 2 semiprime numbers.