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68670105 = 357654001
BaseRepresentation
bin1000001011111…
…01001010011001
311210012210200020
410011331022121
5120034420410
610451501053
71462454250
oct405751231
9153183606
1068670105
1135842959
121abb7789
13112c43ca
149197797
156066a70
hex417d299

68670105 has 16 divisors (see below), whose sum is σ = 125568384. Its totient is φ = 31392000.

The previous prime is 68670103. The next prime is 68670131. The reversal of 68670105 is 50107686.

It is not a de Polignac number, because 68670105 - 21 = 68670103 is a prime.

It is a super-2 number, since 2×686701052 = 9431166641422050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68670103) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 326896 + ... + 327105.

It is an arithmetic number, because the mean of its divisors is an integer number (7848024).

Almost surely, 268670105 is an apocalyptic number.

It is an amenable number.

68670105 is a deficient number, since it is larger than the sum of its proper divisors (56898279).

68670105 is a wasteful number, since it uses less digits than its factorization.

68670105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654016.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 68670105 is about 8286.7427255828. The cubic root of 68670105 is about 409.5018836727.

The spelling of 68670105 in words is "sixty-eight million, six hundred seventy thousand, one hundred five".

Divisors: 1 3 5 7 15 21 35 105 654001 1962003 3270005 4578007 9810015 13734021 22890035 68670105