Base | Representation |
---|---|
bin | 111100111111000001101 |
3 | 10202112012221 |
4 | 13213320031 |
5 | 1002421344 |
6 | 110455341 |
7 | 22662043 |
oct | 7477015 |
9 | 3675187 |
10 | 1998349 |
11 | 1145431 |
12 | 804551 |
13 | 54c772 |
14 | 3a0393 |
15 | 297184 |
hex | 1e7e0d |
1998349 has 2 divisors, whose sum is σ = 1998350. Its totient is φ = 1998348.
The previous prime is 1998343. The next prime is 1998371. The reversal of 1998349 is 9438991.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 1155625 + 842724 = 1075^2 + 918^2 .
It is a cyclic number.
It is not a de Polignac number, because 1998349 - 23 = 1998341 is a prime.
It is an Ulam number.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (1998341) 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 as a sum of consecutive naturals, namely, 999174 + 999175.
It is an arithmetic number, because the mean of its divisors is an integer number (999175).
21998349 is an apocalyptic number.
It is an amenable number.
1998349 is a deficient number, since it is larger than the sum of its proper divisors (1).
1998349 is an equidigital number, since it uses as much as digits as its factorization.
1998349 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 69984, while the sum is 43.
The square root of 1998349 is about 1413.6297252110. The cubic root of 1998349 is about 125.9574266178.
The spelling of 1998349 in words is "one million, nine hundred ninety-eight thousand, three hundred forty-nine".
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