Base | Representation |
---|---|
bin | 1011110111111101001… |
… | …1110100110011101101 |
3 | 201111120001210112210012 |
4 | 2331333103310303231 |
5 | 11320242314211011 |
6 | 233414354223005 |
7 | 20511203001206 |
oct | 2757723646355 |
9 | 644501715705 |
10 | 203999366381 |
11 | 79574362378 |
12 | 33652b84a65 |
13 | 16310a7b365 |
14 | 9c3330c5ad |
15 | 548e621a8b |
hex | 2f7f4f4ced |
203999366381 has 2 divisors, whose sum is σ = 203999366382. Its totient is φ = 203999366380.
The previous prime is 203999366377. The next prime is 203999366401. The reversal of 203999366381 is 183663999302.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 105361914025 + 98637452356 = 324595^2 + 314066^2 .
It is a cyclic number.
It is not a de Polignac number, because 203999366381 - 22 = 203999366377 is a prime.
It is a super-2 number, since 2×2039993663812 (a number of 23 digits) contains 22 as substring.
It is a Sophie Germain prime.
It is a Curzon number.
It is a self number, because there is not a number n which added to its sum of digits gives 203999366381.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (203999366581) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101999683190 + 101999683191.
It is an arithmetic number, because the mean of its divisors is an integer number (101999683191).
Almost surely, 2203999366381 is an apocalyptic number.
It is an amenable number.
203999366381 is a deficient number, since it is larger than the sum of its proper divisors (1).
203999366381 is an equidigital number, since it uses as much as digits as its factorization.
203999366381 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 11337408, while the sum is 59.
The spelling of 203999366381 in words is "two hundred three billion, nine hundred ninety-nine million, three hundred sixty-six thousand, three hundred eighty-one".
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