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68018353 = 1347111323
BaseRepresentation
bin1000000110111…
…10000010110001
311201222200122021
410003132002301
5114403041403
610425511441
71454101144
oct403360261
9151880567
1068018353
1135438217
121a942581
1311126860
14906805b
155e888bd
hex40de0b1

68018353 has 8 divisors (see below), whose sum is σ = 74809728. Its totient is φ = 61449744.

The previous prime is 68018341. The next prime is 68018359. The reversal of 68018353 is 35381086.

It is a happy number.

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 68018353 - 29 = 68017841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68018359) 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, 55051 + ... + 56272.

It is an arithmetic number, because the mean of its divisors is an integer number (9351216).

Almost surely, 268018353 is an apocalyptic number.

It is an amenable number.

68018353 is a deficient number, since it is larger than the sum of its proper divisors (6791375).

68018353 is a wasteful number, since it uses less digits than its factorization.

68018353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111383.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 68018353 is about 8247.3239902407. The cubic root of 68018353 is about 408.2022277788.

The spelling of 68018353 in words is "sixty-eight million, eighteen thousand, three hundred fifty-three".

Divisors: 1 13 47 611 111323 1447199 5232181 68018353