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19999289 = 59419809
BaseRepresentation
bin100110001001…
…0101000111001
31101122001212102
41030102220321
520104434124
61552353145
7331663652
oct114225071
941561772
1019999289
111031a842
1268457b5
1341b2ccb
142928529
151b50aae
hex1312a39

19999289 has 8 divisors (see below), whose sum is σ = 20412000. Its totient is φ = 19589152.

The previous prime is 19999283. The next prime is 19999297. The reversal of 19999289 is 98299991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-19999289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19999283) 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, 24317 + ... + 25125.

It is an arithmetic number, because the mean of its divisors is an integer number (2551500).

Almost surely, 219999289 is an apocalyptic number.

It is an amenable number.

19999289 is a deficient number, since it is larger than the sum of its proper divisors (412711).

19999289 is an equidigital number, since it uses as much as digits as its factorization.

19999289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287.

The product of its digits is 944784, while the sum is 56.

The square root of 19999289 is about 4472.0564620765. The cubic root of 19999289 is about 271.4385450365.

The spelling of 19999289 in words is "nineteen million, nine hundred ninety-nine thousand, two hundred eighty-nine".

Divisors: 1 59 419 809 24721 47731 338971 19999289