## Niels Henrik Abel was born on this day 215 years ago.

### Properties of the number 677201:

677201 is a cyclic number.677201 = 7 × 89 × 1087 is a sphenic number and squarefree.

677201 has 3 distinct prime factors, 8 divisors, 27 antidivisors and 573408 totatives.

677201 has a prime digit sum 23 in base 10.

677201 = 338601

^{2}- 338600

^{2}= 48375

^{2}- 48368

^{2}= 3849

^{2}- 3760

^{2}= 855

^{2}- 232

^{2}is the difference of 2 nonnegative squares in 4 ways.

677201 is the difference of 2 positive pentagonal numbers in 4 ways.

677201 = 24

^{2}+ 65

^{2}+ 820

^{2}is the sum of 3 positive squares.

677201

^{2}= 296751

^{2}+ 608720

^{2}is the sum of 2 positive squares in 1 way.

677201

^{2}is the sum of 3 positive squares.

677201 is a proper divisor of 257

^{132}- 1.

677201 is palindromic in (at least) base -40.

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