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12389830907 = 19597632231
BaseRepresentation
bin10111000100111110…
…11101000011111011
31011222110122121211012
423202133131003323
5200333244042112
65405233024135
7616013552666
oct134237350373
934873577735
1012389830907
115288811383
1224993b504b
131225b555bc
148576d66dd
154c7ac6022
hex2e27dd0fb

12389830907 has 4 divisors (see below), whose sum is σ = 12390482736. Its totient is φ = 12389179080.

The previous prime is 12389830891. The next prime is 12389830909. The reversal of 12389830907 is 70903898321.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12389830907 - 24 = 12389830891 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12389830909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296519 + ... + 335712.

It is an arithmetic number, because the mean of its divisors is an integer number (3097620684).

Almost surely, 212389830907 is an apocalyptic number.

12389830907 is a deficient number, since it is larger than the sum of its proper divisors (651829).

12389830907 is an equidigital number, since it uses as much as digits as its factorization.

12389830907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651828.

The product of its (nonzero) digits is 653184, while the sum is 50.

The spelling of 12389830907 in words is "twelve billion, three hundred eighty-nine million, eight hundred thirty thousand, nine hundred seven".

Divisors: 1 19597 632231 12389830907