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2712808709 = 13401520393
BaseRepresentation
bin1010000110110010…
…0010110100000101
321000001121221221122
42201230202310011
521023434334314
61125104523325
7124140331202
oct24154426405
97001557848
102712808709
111172345376
12638620545
1334304c870
141ba408ca9
1510d26528e
hexa1b22d05

2712808709 has 8 divisors (see below), whose sum is σ = 2928777432. Its totient is φ = 2497881600.

The previous prime is 2712808697. The next prime is 2712808727. The reversal of 2712808709 is 9078082172.

It can be written as a sum of positive squares in 4 ways, for example, as 573746209 + 2139062500 = 23953^2 + 46250^2 .

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 2712808709 - 28 = 2712808453 is a prime.

It is a super-3 number, since 3×27128087093 (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2712808709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2712808309) 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 7 ways as a sum of consecutive naturals, for example, 254984 + ... + 265409.

It is an arithmetic number, because the mean of its divisors is an integer number (366097179).

Almost surely, 22712808709 is an apocalyptic number.

It is an amenable number.

2712808709 is a deficient number, since it is larger than the sum of its proper divisors (215968723).

2712808709 is a wasteful number, since it uses less digits than its factorization.

2712808709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520807.

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 2712808709 is about 52084.6302569194. The cubic root of 2712808709 is about 1394.6751313320.

The spelling of 2712808709 in words is "two billion, seven hundred twelve million, eight hundred eight thousand, seven hundred nine".

Divisors: 1 13 401 5213 520393 6765109 208677593 2712808709