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68346761 = 7731311021
BaseRepresentation
bin1000001001011…
…10001110001001
311202121101010112
410010232032021
5114444044021
610440524105
71456636460
oct404561611
9152541115
1068346761
1135641a2a
121aa80635
1311210192
1491119d7
156000d5b
hex412e389

68346761 has 16 divisors (see below), whose sum is σ = 79863168. Its totient is φ = 57283200.

The previous prime is 68346757. The next prime is 68346769. The reversal of 68346761 is 16764386.

It is a cyclic number.

It is not a de Polignac number, because 68346761 - 22 = 68346757 is a prime.

It is a super-2 number, since 2×683467612 = 9342559478382242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68346769) 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 15 ways as a sum of consecutive naturals, for example, 66431 + ... + 67451.

It is an arithmetic number, because the mean of its divisors is an integer number (4991448).

Almost surely, 268346761 is an apocalyptic number.

It is an amenable number.

68346761 is a deficient number, since it is larger than the sum of its proper divisors (11516407).

68346761 is a wasteful number, since it uses less digits than its factorization.

68346761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232.

The product of its digits is 145152, while the sum is 41.

The square root of 68346761 is about 8267.2099888657. The cubic root of 68346761 is about 408.8581375241.

The spelling of 68346761 in words is "sixty-eight million, three hundred forty-six thousand, seven hundred sixty-one".

Divisors: 1 7 73 131 511 917 1021 7147 9563 66941 74533 133751 521731 936257 9763823 68346761