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68519269 = 71331107227
BaseRepresentation
bin1000001010110…
…00010101100101
311202221010202201
410011120111211
5120020104034
610444334501
71461255430
oct405302545
9152833681
1068519269
113574a5a5
121ab44431
1311270860
149158817
156037014
hex4158565

68519269 has 32 divisors (see below), whose sum is σ = 88252416. Its totient is φ = 51744960.

The previous prime is 68519261. The next prime is 68519281. The reversal of 68519269 is 96291586.

It is a cyclic number.

It is not a de Polignac number, because 68519269 - 23 = 68519261 is a prime.

It is a super-2 number, since 2×685192692 = 9389780448588722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68519261) 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 31 ways as a sum of consecutive naturals, for example, 301734 + ... + 301960.

It is an arithmetic number, because the mean of its divisors is an integer number (2757888).

Almost surely, 268519269 is an apocalyptic number.

It is an amenable number.

68519269 is a deficient number, since it is larger than the sum of its proper divisors (19733147).

68519269 is a wasteful number, since it uses less digits than its factorization.

68519269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385.

The product of its digits is 233280, while the sum is 46.

The square root of 68519269 is about 8277.6366796327. The cubic root of 68519269 is about 409.2018360454.

The spelling of 68519269 in words is "sixty-eight million, five hundred nineteen thousand, two hundred sixty-nine".

Divisors: 1 7 13 31 91 107 217 227 403 749 1391 1589 2821 2951 3317 7037 9737 20657 23219 24289 43121 49259 91481 170023 301847 315757 640367 752959 2210299 5270713 9788467 68519269