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6868769 = 137181277
BaseRepresentation
bin11010001100111100100001
3110220222011212
4122030330201
53224300034
6403115505
7112245365
oct32147441
913828155
106868769
113971676
122372b95
13156657b
14cab2a5
1590a2ce
hex68cf21

6868769 has 8 divisors (see below), whose sum is σ = 6982248. Its totient is φ = 6756480.

The previous prime is 6868759. The next prime is 6868781. The reversal of 6868769 is 9678686.

It can be written as a sum of positive squares in 4 ways, for example, as 46225 + 6822544 = 215^2 + 2612^2 .

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 6868769 - 216 = 6803233 is a prime.

It is a super-2 number, since 2×68687692 = 94359975150722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6868739) 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, 24659 + ... + 24935.

It is an arithmetic number, because the mean of its divisors is an integer number (872781).

Almost surely, 26868769 is an apocalyptic number.

It is an amenable number.

6868769 is a deficient number, since it is larger than the sum of its proper divisors (113479).

6868769 is a wasteful number, since it uses less digits than its factorization.

6868769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595.

The product of its digits is 870912, while the sum is 50.

The square root of 6868769 is about 2620.8336459989. The cubic root of 6868769 is about 190.0901603490.

The spelling of 6868769 in words is "six million, eight hundred sixty-eight thousand, seven hundred sixty-nine".

Divisors: 1 137 181 277 24797 37949 50137 6868769