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68147007 = 337718647
BaseRepresentation
bin1000000111111…
…01011100111111
311202020020010020
410003331130333
5114421201012
610432343223
71455145215
oct403753477
9152206106
1068147007
1135515945
121a9a4b13
1311170296
14909ccb5
155eb1a8c
hex40fd73f

68147007 has 16 divisors (see below), whose sum is σ = 94643712. Its totient is φ = 43575840.

The previous prime is 68146997. The next prime is 68147011. The reversal of 68147007 is 70074186.

It is not a de Polignac number, because 68147007 - 215 = 68114239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68147077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3558 + ... + 12204.

It is an arithmetic number, because the mean of its divisors is an integer number (5915232).

Almost surely, 268147007 is an apocalyptic number.

68147007 is a deficient number, since it is larger than the sum of its proper divisors (26496705).

68147007 is a wasteful number, since it uses less digits than its factorization.

68147007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8758.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 68147007 is about 8255.1200475826. The cubic root of 68147007 is about 408.4594317572.

The spelling of 68147007 in words is "sixty-eight million, one hundred forty-seven thousand, seven".

Divisors: 1 3 37 71 111 213 2627 7881 8647 25941 319939 613937 959817 1841811 22715669 68147007