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12228889 is a prime number
BaseRepresentation
bin101110101001…
…100100011001
3212000021212211
4232221210121
511112311024
61114035121
7205641511
oct56514431
925007784
1012228889
1169a2822
124118aa1
1326c223a
1418a4841
151118594
hexba9919

12228889 has 2 divisors, whose sum is σ = 12228890. Its totient is φ = 12228888.

The previous prime is 12228869. The next prime is 12228901. The reversal of 12228889 is 98882221.

12228889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9406489 + 2822400 = 3067^2 + 1680^2 .

It is a cyclic number.

It is not a de Polignac number, because 12228889 - 25 = 12228857 is a prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (12228809) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6114444 + 6114445.

It is an arithmetic number, because the mean of its divisors is an integer number (6114445).

Almost surely, 212228889 is an apocalyptic number.

It is an amenable number.

12228889 is a deficient number, since it is larger than the sum of its proper divisors (1).

12228889 is an equidigital number, since it uses as much as digits as its factorization.

12228889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36864, while the sum is 40.

The square root of 12228889 is about 3496.9828423943. The cubic root of 12228889 is about 230.3893154386.

The spelling of 12228889 in words is "twelve million, two hundred twenty-eight thousand, eight hundred eighty-nine".