12220489 has 2 divisors, whose sum is σ = 12220490. Its totient is φ = 12220488.

The previous prime is 12220457. The next prime is 12220519. The reversal of 12220489 is 98402221.

12220489 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., 7112889 + 5107600 = 2667^2 + 2260^2 .

It is an emirp because it is prime and its reverse (98402221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12220489 - 2⁵ = 12220457 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12227489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110244 + 6110245.

It is an arithmetic number, because the mean of its divisors is an integer number (6110245).

Almost surely, 2^12220489 is an apocalyptic number.

It is an amenable number.

12220489 is a deficient number, since it is larger than the sum of its proper divisors (1).

12220489 is an equidigital number, since it uses as much as digits as its factorization.

12220489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 12220489 is about 3495.7816007297. The cubic root of 12220489 is about 230.3365520319.

The spelling of 12220489 in words is "twelve million, two hundred twenty thousand, four hundred eighty-nine".