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68417713 = 7133179307
BaseRepresentation
bin1000001001111…
…11100010110001
311202201222110101
410010333202301
5120003331323
610442232401
71460353360
oct404774261
9152658411
1068417713
1135690271
121aab5701
1311236570
14912d7d7
156016dad
hex413f8b1

68417713 has 32 divisors (see below), whose sum is σ = 88309760. Its totient is φ = 51554880.

The previous prime is 68417693. The next prime is 68417719. The reversal of 68417713 is 31771486.

It is a de Polignac number, because none of the positive numbers 2k-68417713 is a prime.

It is the 8272-nd Hogben number.

It is not an unprimeable number, because it can be changed into a prime (68417719) by changing a digit.

It is a nontrivial repunit in base 8271.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 222706 + ... + 223012.

It is an arithmetic number, because the mean of its divisors is an integer number (2759680).

Almost surely, 268417713 is an apocalyptic number.

It is an amenable number.

68417713 is a deficient number, since it is larger than the sum of its proper divisors (19892047).

68417713 is a wasteful number, since it uses less digits than its factorization.

68417713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437.

The product of its digits is 28224, while the sum is 37.

The square root of 68417713 is about 8271.5000453364. The cubic root of 68417713 is about 408.9995695861. Note that the first 3 decimals are identical.

The spelling of 68417713 in words is "sixty-eight million, four hundred seventeen thousand, seven hundred thirteen".

Divisors: 1 7 13 31 79 91 217 307 403 553 1027 2149 2449 2821 3991 7189 9517 17143 24253 27937 31837 66619 123721 169771 222859 315289 751843 866047 2207023 5262901 9773959 68417713