12120989 has 2 divisors, whose sum is σ = 12120990. Its totient is φ = 12120988.

The previous prime is 12120967. The next prime is 12121009. The reversal of 12120989 is 98902121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12040900 + 80089 = 3470^2 + 283^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12120989 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12120919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060494 + 6060495.

It is an arithmetic number, because the mean of its divisors is an integer number (6060495).

Almost surely, 2^12120989 is an apocalyptic number.

It is an amenable number.

12120989 is a deficient number, since it is larger than the sum of its proper divisors (1).

12120989 is an equidigital number, since it uses as much as digits as its factorization.

12120989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 12120989 is about 3481.5210756220. The cubic root of 12120989 is about 229.7097093831.

The spelling of 12120989 in words is "twelve million, one hundred twenty thousand, nine hundred eighty-nine".