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12998870143 = 71856981449
BaseRepresentation
bin11000001101100101…
…10000010001111111
31020112220200000120221
430012302300101333
5203110202321033
65545510522211
7640060400410
oct140662602177
936486600527
1012998870143
115570583596
122629366367
1312c209764c
148b4553807
155112cc12d
hex306cb047f

12998870143 has 4 divisors (see below), whose sum is σ = 14855851600. Its totient is φ = 11141888688.

The previous prime is 12998870113. The next prime is 12998870161. The reversal of 12998870143 is 34107889921.

12998870143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34107889921 = 74872555703.

It is not a de Polignac number, because 12998870143 - 217 = 12998739071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12998870113) 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 3 ways as a sum of consecutive naturals, for example, 928490718 + ... + 928490731.

It is an arithmetic number, because the mean of its divisors is an integer number (3713962900).

Almost surely, 212998870143 is an apocalyptic number.

12998870143 is a deficient number, since it is larger than the sum of its proper divisors (1856981457).

12998870143 is an equidigital number, since it uses as much as digits as its factorization.

12998870143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1856981456.

The product of its (nonzero) digits is 870912, while the sum is 52.

The spelling of 12998870143 in words is "twelve billion, nine hundred ninety-eight million, eight hundred seventy thousand, one hundred forty-three".

Divisors: 1 7 1856981449 12998870143