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68006217 = 3179126641
BaseRepresentation
bin1000000110110…
…11000101001001
311201222001222210
410003123011021
5114402144332
610425335333
71454020566
oct403330511
9151861883
1068006217
113542a094
121a937549
1311121186
14906386d
155e84ecc
hex40db149

68006217 has 8 divisors (see below), whose sum is σ = 91182240. Its totient is φ = 45083840.

The previous prime is 68006203. The next prime is 68006231. The reversal of 68006217 is 71260086.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (68006203) and next prime (68006231).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68006217 - 26 = 68006153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68006297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62784 + ... + 63857.

It is an arithmetic number, because the mean of its divisors is an integer number (11397780).

Almost surely, 268006217 is an apocalyptic number.

It is an amenable number.

68006217 is a deficient number, since it is larger than the sum of its proper divisors (23176023).

68006217 is a wasteful number, since it uses less digits than its factorization.

68006217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126823.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 68006217 is about 8246.5882036149. The cubic root of 68006217 is about 408.1779488567.

The spelling of 68006217 in words is "sixty-eight million, six thousand, two hundred seventeen".

Divisors: 1 3 179 537 126641 379923 22668739 68006217