12204989 has 2 divisors, whose sum is σ = 12204990. Its totient is φ = 12204988.

The previous prime is 12204961. The next prime is 12205001. The reversal of 12204989 is 98940221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12020089 + 184900 = 3467^2 + 430^2 .

It is a cyclic number.

It is not a de Polignac number, because 12204989 - 2²⁰ = 11156413 is a prime.

It is a Chen prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12204089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6102494 + 6102495.

It is an arithmetic number, because the mean of its divisors is an integer number (6102495).

Almost surely, 2^12204989 is an apocalyptic number.

It is an amenable number.

12204989 is a deficient number, since it is larger than the sum of its proper divisors (1).

12204989 is an equidigital number, since it uses as much as digits as its factorization.

12204989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 12204989 is about 3493.5639395895. The cubic root of 12204989 is about 230.2391274781.

The spelling of 12204989 in words is "twelve million, two hundred four thousand, nine hundred eighty-nine".