12249989 has 2 divisors, whose sum is σ = 12249990. Its totient is φ = 12249988.

The previous prime is 12249983. The next prime is 12250009. The reversal of 12249989 is 98994221.

12249989 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., 10029889 + 2220100 = 3167^2 + 1490^2 .

It is a cyclic number.

It is not a de Polignac number, because 12249989 - 2⁴ = 12249973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12249983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6124994 + 6124995.

It is an arithmetic number, because the mean of its divisors is an integer number (6124995).

Almost surely, 2^12249989 is an apocalyptic number.

It is an amenable number.

12249989 is a deficient number, since it is larger than the sum of its proper divisors (1).

12249989 is an equidigital number, since it uses as much as digits as its factorization.

12249989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 44.

The square root of 12249989 is about 3499.9984285711. The cubic root of 12249989 is about 230.5217456032.

The spelling of 12249989 in words is "twelve million, two hundred forty-nine thousand, nine hundred eighty-nine".