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12643313 is a prime number
BaseRepresentation
bin110000001110…
…101111110001
3212210100100212
4300032233301
511214041223
61130553505
7212315654
oct60165761
925710325
1012643313
117156121
124298895
132808a67
14197189b
15119b278
hexc0ebf1

12643313 has 2 divisors, whose sum is σ = 12643314. Its totient is φ = 12643312.

The previous prime is 12643283. The next prime is 12643349. The reversal of 12643313 is 31334621.

12643313 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10549504 + 2093809 = 3248^2 + 1447^2 .

It is a cyclic number.

It is not a de Polignac number, because 12643313 - 26 = 12643249 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12643363) 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, 6321656 + 6321657.

It is an arithmetic number, because the mean of its divisors is an integer number (6321657).

Almost surely, 212643313 is an apocalyptic number.

It is an amenable number.

12643313 is a deficient number, since it is larger than the sum of its proper divisors (1).

12643313 is an equidigital number, since it uses as much as digits as its factorization.

12643313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 23.

The square root of 12643313 is about 3555.7436634268. The cubic root of 12643313 is about 232.9630068920.

Adding to 12643313 its reverse (31334621), we get a palindrome (43977934).

The spelling of 12643313 in words is "twelve million, six hundred forty-three thousand, three hundred thirteen".