12206989 has 2 divisors, whose sum is σ = 12206990. Its totient is φ = 12206988.

The previous prime is 12206939. The next prime is 12206993. The reversal of 12206989 is 98960221.

12206989 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., 8037225 + 4169764 = 2835^2 + 2042^2 .

It is an emirp because it is prime and its reverse (98960221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12206989 - 2⁷ = 12206861 is a prime.

It is a super-2 number, since 2×12206989² = 298021160892242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12206939) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6103494 + 6103495.

It is an arithmetic number, because the mean of its divisors is an integer number (6103495).

Almost surely, 2^12206989 is an apocalyptic number.

It is an amenable number.

12206989 is a deficient number, since it is larger than the sum of its proper divisors (1).

12206989 is an equidigital number, since it uses as much as digits as its factorization.

12206989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 12206989 is about 3493.8501685104. The cubic root of 12206989 is about 230.2517030215.

The spelling of 12206989 in words is "twelve million, two hundred six thousand, nine hundred eighty-nine".